I definitely need medication to deal with severe anxiety/stress and I don't think there's anything shameful about taking medications you are prescribed if you have tried everything you can and the anxiety is not dissipating. If you need to keep this job for now, I would see taking medication as totally okay, even if it technically circumstantial. As yagalada said, trying to stay mindful (in the moment) can sometimes help. It's hard, but it's a relaxing state of mind to be in if you can manage it -- even for just a few seconds or a few minutes. Every little bit is improvement and counts.

I hope things get easier for you.