HELP! Has anyone delt with anything like this?!

sally

My husband started to feel very lightheaded back in November while driving and it progressively got worse to the point today he can just be sitting on the couch and he will get very lightheaded like he is about to pass out (sometimes he does) and he gets heart palpitations with this multiple times a day now. He can drive or work due to the fact so I’m having to find a job. We’ve been to multiple doctors, a lot of testing and imaging done and nothing has came back abnormal. We’ve been to the ER too many times in the past two months. It’s affecting our life’s and it’s become very stressful. He is doing a heart monitor right now to see if it is a heart problem but his imaging came back good. Idk what’s going on.