Hi I have been experiencing panic attacks and anxiety for about a year on and off, I started on sertraline 4 weeks ago( 2.5 weeks at 25mg and 1.5 weeks at 50mg) so far. I thought I was through three side effects as I felt ok and the nausea etc had subsided and in the first few weeks I had some bad panic attacks they had calmed down. However the last two days on the afternoon I have been experiencing some feelings that i haven't had before and I dont know if I need to go to the hospital. It's like a feeling in my stomach that shoots through me for a split second and makes me feel dizzy. Then it happens again.... but by then im really worried about it so know I might be adding fuel to the fire. I've just never had these feelings out of the blue before both days I was just sitting there on the couch when it happened. I'm terrified it could be signs of a stroke or that im about to die. Its It's so scary and im not sure how best to deal with it. Any ideas?