TTC but too stressed out.

I have alot on my mind. How can I relax my mind ? I've been trying to conceive for over 2 years now after my miscarriage and every since I can't stop thinking about getting pregnant. How can I relax and not think about getting pregnant when that is all I want ? I can't get over losing my child and it's easy for ppl to say relax and and it's happen. I try to tell myself that all the time but it's so hard to do. My husband stresses me out all he does is drink and smoke could that be a problem or is it me? I don't don't smoke but this month I've been drinking. Like I said I'm trying to relax. I don't know what to do anymore.