Only smoked for a little bit but having withdrawals?

I smoked around 8-10 packs in a two months period ending June 30th. Since then I’ve been having panic attacks, insane anxiety and nausea. I also slowed down on to almost no caffeine. Is this normal? I’m also type 1 diabetic so I’ve been going crazy thinking I now have celiac, or some other autoimmune disorder. I’ve started exercising more and only experience the nausea when I’m sitting at my computer in the morning or at night.