It's been three months and I can't go on any longer

I don't know what's wrong with my face these days!
About 3 months ago, I flew over to Cali to spend summer break with my family. I don't know what happened, but I started developing this red circle spot on the right side of my face near the headline across from my eyebrow. It didn't itch at first, it was just there, so I was like whatever maybe it'll go away. I haven't been using any new or different products, just same routine as usual. And I have already spent winter break in Cali before. After that, it started itching, it became something like a raised plaque, then it would dry up and crust (to a light brown), but never go away. Soon there was one on the left side near my left eyebrow. It wasn't as bad as the other one. Also, I noticed whenever I worked out my jawline and neck would get really itchy and these it would just get red there in general and red dots would appear. Also whenever I took a shower, all these spots (including the one near the hairline) would get really bright red again and just throb. I took pretty steamy showers.
My mom had Elidel from when my brother used to get eczema, and so I thought maybe it's eczema so I put it on. In a couple of days it got really better. I was so happy and thought that would be the end of those horrible spots...right? Wrong! I started not putting on Elidel as much and would skip to every couple of days. It was still alright.
About a week ago, I went to an amusement park and I put on some sunscreen but that was it. The usual sunscreen I have always used. It was really hot that day. My face was really hot and felt burnt, and when I went home and washed my face it looked like my face was scalded from like hot water or something. I was like literally burnt! And I got these red welts with bumps developed that stretched from where the two red spots were near my hairline all the way down to my ears and on my lower cheeks towards my lips. Also the back of my ears were itchy and bumpy. I think it was the sunscreen. Anyway, I was so mad I stopped using any skincare or sunscreen products on my face altogether for fear of another angry lashout. And then the uncontrollable itching started. Earlier it wasn't so bad, but now my skin was really aggravated. Not only did my entire side of my face itch, but also my scalp and hair got REALLY dry and I started developing dandruff! Note that I didn't have dandruff before. Also I got all these prickly sensations in my scalp, neck, face, back, and occassionally legs. I was so miserable. And also the sides of my nostrils became a little red, the whites of my eyes were a little yellow/red (or maybe it's because of lack of sleep on some nights), and I started to itch on the top of my forehead near the hairline. Whenever I took a shower (this time I took COLD showers) the spots on my face and jawline pulsed and throbbed, red and angry. Then it would calm down overnight. I don't rub my face with the towel I pat it gently. I also have never been allergic to the shampoos. So now my face is a combination of red bump welts and brown spots where it is dried up. Oh and what's weird that I forgot to mention earlier was one day I was wearing these hoop earrings (they're not real silver) and the place where my hoop earring touched the side of my face when I moved there was a red itchy spot. Which is weird because the left side which was touched by the earring was okay. I think my skin is really freaking out on me.
My mom says my skin is dumping out all the toxins that I have fed my face with - I am a product junkie and have lots of toners, moisturizers, serums, creams, masks, makeup, etc. Usually my face is tolerant with all sorts of products and I have never experienced a breakout with a new cosmetic product or skincare product, but my mom says that my skin is probably really weared down from using so much and couldn't hold it anymore and now is going all psycho on me.
I have NO idea what I did. I have never experienced this in my life! I've been complimented for my flawless and glowy skin, and people used to call me a Neutrogena model because my skin was so radiant. And in a matter of months, my face is really uneven, rough, red, bumpy, burned, brown scabs, red bumps and welts, dark undereye circles. I am so sick of this, I don't know what to do. I'm making an appointment with a dermatologist tomorrow, but I don't know if strong medication is the way to go. *sigh* I'm not looking forward to school next week. I feel so shitty.
I'm sorry for the rant. It's just...I feel so depressed right now. If someone could help me, I would be so thankful and I would just CRY WITH JOY if something miraculous happened, or at least some positive progress.