Severe headache. Specialist to visit.

Recently when i got bedridden due to left foot bone fracture, that hospital ward gave me a diaper(which is a plastic materialed diaper), removing all my clothes i weared it before taking me to bone surgery. post surgery i had been bedridden for several hours. later on when i woke up i got some itchy burning pain on my buttocks due to the plastic diaper given by the hospital ward member. so, i asked to remove then he did so but i got some rashes & pimple like wound on my buttocks & then i discharged after 2 days, came to home since then i got bedridden due to severe headache, that headache is giving a lot of pain to me when i sit & stand, especially when i sit & relieving when i lay down to bed, unable to tolerate the pain. so, i've been only lying to the bed since i came home from the hospital & it's been 4 days now. please help me out with resolution for this. And I'm scared that is it Celiac disease or Gluten intolerance or Meningitis. Please let me know which specialist to visit.