Allergic reaction. Please help

About two days ago I used a moisturizer on my face, neck and chest, and woke up the next morning with an allergic reaction. Intense itching, swollen face, swollen lymph nodes, and a rash everywhere that I put the moisturizer. I went to urgent care because I was worried about the swelling. The dr. prescribed me prednisone and told me to use a benadryl topical on top of that. I have yet to take anything he has prescribed. I'm at a loss because I've been working so hard on being "natural" that this I feel would just be a step back. I told myself if I TRULY TRULY need the medicine that I would take it.

Today, the redness has gone down, and so has the itching, but the swelling in my face is slightly worse. Is there anything natural that I can drink/take that might help with the swelling, help this pass??? I've washed my face, body, and hair multiple times so far. Stopped all supplements I was taking before and am now just taking 3,000mg Vitamin C and echinacea. I'm also drinking ACV and lots of water. Tweet