My Paranoia is a Pain in My Neck!

It's been a week since quitting. Most of the initial withdrawal symptoms have gone away. I'm losing my patience easily,stop smoking now, but I'm good at catching myself before I go crazy around people, haha. Has anyone felt paranoid after their quit? I know I was going through major anxiety, so much to the point that I'd cry and ask God why, haha. But I just feel that something might happen or could go wrong. In no way do I think I might hurt myself, but I guess I feel paranoid that my current symptoms could be something else. I still get some chest pains (not tightness,smoking cessation, but aches) at night, and the back of my neck is so sore on the right side. The pain in my neck is the most concerning thing for me. I don't know if my neck pain is from just sleeping awkwardly or from jogging again. I'm just really uncomfortable whether I'm sitting or laying down.I also cannot be alone unless I'm doing something productive or else I get more nervous.ugh... i know that this all stems from the quit but some reassurance from other quitters would be awesome, especially about the back of the neck pain, haha... dang paranoia.