Advice on handling anxiety symptoms

I don't normally post on this board. I'm kind regular to depression and fibromyalgia. I'm dealing with a lot right now. I've never handled stress well (OCD, PTSD) but lately I'm a mess. My dr says anyone would be stressed and medication won't help. I am going to therapy but the things I have on my mind are important things that I can't ignore. I thought I'd ask for advice on how to deal with the symptoms of all of this anxiety. I get dizzy, horrible stomach/chest pain, sick to my stomach, headaches and more. The stomach stuff is my biggest issue. It's constant and I can't anything done if I'm living in the bathroom. So far OTC stuff hasn't helped. Any advice would be great. The bathroom floor is cold and uncomfortable, you know.