just started buspar

I have had like 5 major panic attacks a day every day for years but always refused treatment, finally last week I talked to my psych ab trying something for it and he put me on buspar, I waited a week to start it because I was really scared (still am) about new medications and so far what I’ve noticed is that when I stand up my head feels like it’s full of helium? Can anyone tell me what I should expect or share their experience I feel like I’m going in blind and I don’t want to google and find worst case scenarios LOL