my blood pressure is 90/60 and I have been feeling so sick nausea, lightheadedness, flushing ,dizzy, weak, feeling really weird, and heart palapetations. any way I take cozzar for high blood pressure and has been stable till this week. I need to go and am scheduled to have food allergy testing done tomorrow so I have stopped all antihistimines since Monday I have been having allergy issues all week and I do get allergy injections . I also have had a select nerve root epidural injection done one my back 2 weeks ago. I have been getting worse as time goes on . I get and have also struggled with a migraine this week too. So my question is can stopping the antihistimines with all this happening cause my blood pressure drop and all this to be happening? I am 55 year old female. what suggestions help.