Dealing with Anxiety in Emergency Services

I just started a job in emergency services that is triggering my anxiety. I’ve had debilitating anxiety my entire life until about 8 years ago when I started taking lexapro in addition to the self-soothing practices I taught myself both instinctively and with therapy. I thought I had it all under control so didn’t think twice about taking this job. Now I frequently have panic attacks and feel a high level of anxiety constantly. Anyone deal with something similar? I feel this job is high-stress and high-stakes enough that even “normal” people with no anxiety disorders experience anxiety from it. But there also seem to be people I work with who are completely unfazed.