I was at work on Friday night, I work in a restaurant, very fast paced and busy; I started to feel overwhelmed, although I had been at the job for 13 years and I knew everything about it and have never had any issues working, on Friday for some reason I felt a little off, just before the dinner rush

I felt sick, like I had to throw up, I was pacing about wondering why I had a feeling of throwing up, my heart rate went up, sometimes my chest would have a pain directly in the middle where the oesophagus ends (and a few days prior). For the first time ever whatever this thing was it consumed me and I was physically unable to work, I went to the bathroom and sat for a while and when I came back out I was okay, few spikes here and there but towards the end of the night it was all gone. 

I’ve had this feeling before (always in a Friday for some reason) but I always assumed it was no big issue, I was diagnosed with gastritis last year in august where the same thing happened and I completely broke down at work because. When I went to the doctor she told me I had gastritis and after managing that for a little while it was all healed. 
Some days I get that similar feeling it could be very slight and I’m able to cope with it, or sometimes it can be full on and whatever it was on Friday night it was intense because I had to stop work for a few minutes. 
My guess is some sort of anxiety and my body telling me to leave the job as I have been there for 13 years and I’m just being told enough is enough. What do you guys think ? Would love the get some opinions. 

Hope I was able to explain that well, please feel free to ask any more questions if need be