What can i do to treat my sunburn?

Not much: Apply moisturizing lotions to keep it from drying, and this will help some. Aloe is considered helpful by some. If you have actual blistering, then this is a second degree burn, and should be treated with an antibiotic cream-neosporin- until it heals.

Sunburn pain: Aloe vera (aloe barbadensis) can reduce redness, pain, itching & swelling from a burn. It has anesthetic, anti-inflammatory & antibacterial / antifungal qualities. It can speed burn healing by stimulating growth of new skin. Apply cool compresses. Non-steroidal anti-inflammatories and acetomenophen can be very helpful. Hydrate well and don't peel off any deep layers.