First off Githnir, good luck on quitting smoking. I used the patch. It worked for me well. Sounds like a good idea that you plan on using it too. I've heard terrible things about Chantix and psych problems.
You'd be surpised how much meds can help if you have PTSD. For one thing there are sleeping pills that could help you sleep and I'm sure that there are anti anxiety meds too. There are anti deppresants too.