Please Help. Gross Skin Condition

My stomach is covered in what looks like messed up bumps.
This started months ago as a simple rash. A rash that I get sometimes due to a nickel allergy, since most pant buttons are made of nickel. I usually just put hydrocortisone on it and it goes away quickly. This was different.
I didn't have any hydrocortisone...so I just tried to not scratch it. But it got so itchy that I would even scratch in my sleep. It got much larger because I was scratching such a large area, and I was perpetuating the itch cycle. At this point, it was still a normal rash, just a big one.
Eventually, I tried to bandage it. that only worked a little bit. I used calamine lotion, and it worked for a while, and the scabs that had developed at this point from me ripping my skin open had time to heal. The rash almost went away. Then the calamine lotion stopped working. I would put it on my skin, and it would do nothing. It wouldn't alleviate the itch at all. I don't know why it stopped working.
Recently, it has become more than a rash with scabs. Now, even when I give the scabs some time to heal, it looks like a big cluster of dozens of small bumps that itch and are seemingly hypersensitive when compared to the rest of my skin. If they are broken (which is easy to do due to how sensitive the skin is there), I feel a liquid, which leads me to believe that they are filled with small amounts of clear liquid... It's gross. Some of these bumps are painful, too. Just touching them causes me pain.
This rash has advanced from feeling itchy to feeling mostly painful. I will feel itchy, but not long after scratching, I'll just be in horrible pain. If I scratch too hard and break too much skin, I'll be in pain for days. I don't know what to do. I'm going to get hydrocortisone in the next few days and see if that can alleviate my symptoms, and I've been actively trying to restrain myself, but I'm scared.
This seems to have started spreading to other body parts. The overly sensitive, itchy skin. If I barely scratch it, it breaks out or even just breaks. This has started happening on my legs, arms, and just above my pubic area but below my stomach.
I can't go to a doctor. I don't have insurance. I just don't want to be a disgusting girl with a horrible skin condition on my belly.
Please help.
Here are two photos of it.





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