Every word helps!

Today, while going to gaz up, i saw a big wave hi. I waved back and realised it was ex-h. My anxiety rised.

D16 was working and did not know ex-h was coming to town nor did he visit her at work.

Vanilla, this question is for you.
Just those insignificant encounters get my anxirty to the roof. Knots in the middle of my chest. Why? Can cognitive behavior therapy stop this?
Will it keep coming back everytime ex-h make a unexpected appearance?