I tried to explain this to my therapist and she was like, are you sure it's not a physical thing and it's just anxiety? Which of course freaked me out so I want to see if anyone else gets this. 

I will suddenly just get kind of like a drop in my stomach, like all my nerves are lighting up. The same feeling when you know you're about to get bad news. It just comes out of nowhere. I'm certain this is anxiety but wanted to see if anyone else can relate. 

Thanks everyone, this sub really helps me a lot.