Is Prickly Sensation On Abdomen And Muscle Pain Sign Of Sunburn?

i have been experiencing extremely miserable prickly sensation on my abdomen , muscle aches and pains since the last 8-9 days but no fevers at all or rash. medication taken regularly -PROTONIX 40 MG DAILY for at least 2 years. no other medicines. i was on the beach prior to the onset of symptoms and used my usual sunburn lotion SP 70 which i later realised had expired a while ago. i am otherwise a very healthy , very active male without any medical problems. thanks .will wait for your response. Have used tylenol 325 mg 4 times a day, solarcaine and benadryl 25 mg only last night-with some relief. can this be sunburn? recent labs were normal