I wouldn't say those are common side effects of quitting, but physical side effects in some form are common. It's never a bad idea to see a doctor if you are concerned.
Here's a link to the April Quit Group
https://ktcforum.org/index.php?topic=16165.msg7681062#newGo there and learn to post roll. Posting roll is the price of admission to this otherwise free site. But most importantly, posting roll is what keeps us quit. It's a daily promise to not use nicotine in any form. Go there early each morning, and make your promise.
Another tool here is exchanging digits (phone numbers) with other quitters - guys in your Quit Group, and vets as well. Mine are just a PM away. When you exchange digits, you have an emergency contact - someone you can text/call when you are facing a serious crave, or a tough situation. The more numbers you have, the more likely it is that you'll reach someone if needed.
One thing I need to point out - you don't have a habit. What you have is a full-blown addiction to one of the most addictive chemicals on earth. It's important that you acknowledge that as you quit. Your body will stop at nothing to get nicotine back in its system. The more you respect that, the more likely you are to be successful.
Also, you may want to consider telling your girl friend about your quit. As you noted, she saw something off about you. Her support will only help you remain quit.
Now, as soon as you quit reading this - get in and post roll!
Proud to quit with you.
RDB (1,442)