Your sunburn is known as PHOTOALLERGY/ PHOTOTOXICITY
This condition is not permanent. All of these lesion will be healed. Do not be afraid.
I like to suggest you the following..
1. Take Normal diet and fluid.
2. Take care of skin -i) apply an emolient like White/ liquid paraffin
and or Petrolium jelly ii) Apply topical antibiotic
cream e.g. Fucidic acid, muporicin (Bactroban
ointment) twice daily or a systemic antibiotic iii) You might need a topical /systemic steroid for a short time.
3. Take a pain killer like Indomethacin/Ibuprophen/ naproxen twice daily.
4. Take bed rest.
Before taking any step consult a dermatologist
for perfect use of above drugs.