Hello, I totally comprehend your anxiety for sun burn. It is evident from your query that you have acute sun burn which is causing all the issues. It is very important at this time to do the best of sun protection at its best as is the sole most important factor to get better. I suggest you to do sun protection strictly and also advise you to drink plenty of liquids so that proper hydration can be maintained. In my patients with your situation I advise them to use an antihistaminic tablet such as cetrizine or levocetrizine tablet for two times a day. I also suggest my patients to apply mild to moderate steroid cream ort steroid lotion helps in reducing the burning sensation. If you are not getting better or the problems are increasing then can take an appropriate medical plan from your treating doctor or you can obtain further direction from your treating dermatologist. All the best.