On the whole my anxiety has been improving, so it seems it was just the nicotine withdrawal temporary exacerbating things over my normal base level of anxiety.

However, last night I had a panic attack. That is very unusual for me. I've had 2-3 in the past but only whilst using drugs recreationally, which I don't do anymore.

It was very different from those. I felt a sense of dread with chills & bouts of uncontrollable shaking. Sort of like shivering but 10x worse. I managed to keep my breathing under control though... just...

There was a definite trigger but still... doesn't bode well.