help! New Job Anxiety.

I get severe anxiety and some panic attacks when i start new jobs. i think i just dont like change/transition/uncertainty. its mostly PHYSICAL symptoms.

I recently had to leave my longterm job because the company was going under. I don't love the replacement job i found, but its a job for now.

I keep waking up in the night with my heart pounding, and having stomach aches, just because of nerves.

My current replacement job isnt THAT bad... it works for now, but the transition process itself (until i find something better) is making me sick.

Help! How do i calm down and just say "meh" until i either settle in, or find something new? i wanna be zen! I want to just deal with it and enjoy my life.