My anxiety gets bad to the point where I had to leave one place I worked at because I literally couldn't handle anything.

Months later I found a new job, and after a few grueling weeks, it's creeping back up and I'm scared I'm going to mentally fuck it up for me and lose this job too. 

I love this place, the work, and the people. Well maybe not love but it's very enjoyable and tolerable, low stress at a garden centre. 

I basically have nothing to be anxious about but the mornings are starting to get very tense. Earlier this week my anxiety got so bad I felt physically ill and had to call in sick ( and then get covid test to prove it wasn't covid). 

I'm booked to see a doctor and get meds because I can't afford to lose another job. Why is working so anxiety inducing? Even while I'm at work it's a struggle. I'm going down to 4 shifts because full time is just too much. 

Does anyone else feel this? 
Should i inform my employer on my condition?