hi. i ve been experiencing memory loss which is rapidly getting worse, but at the same time my nasal and sinuses seem to become clogged up. anyway i took benedryl allergy and sinus pills an over the counter. anyways i experienced draining i guess you would say. but i got really dizzy and weak to the point i nearly collapsed. but after two or three hours after i took the pills. my head/brain started to burn and felt starting to swell again. felt like ants climbing over your skin type of sensation. what could be happening?