27 year old female, shortness of breath, wake up with my left hand numb?

I don't eat too well and I don't exercise. I'm not overweight. I have 2 kids and am always under copious amounts of stress (Stay at home mom). Last week, I kept getting bouts of being unable to breathe. Where taking a deep breath was very hard to do. 2 days ago I started waking up with my left hand numb. I didn't sleep on it. The thing that scares me is that when I was pregnant, I used to get scary chest pain where breathing literally HURT me. I'd have to hold my breath because of it. And heart palpitations also. Have not gotten Heart Palpitations SINCE pregnancy and the last time I had any form of chest pain was 5 months ago. I'm also a hypochondriac. The doctor just tugged my arm and said it's anxiety..