Hi kat, I am just curious what were your main symptoms? Was it mostly just the breathing? All of my doctors have pinned it on anxiety as well, but similar to your experience it was hard for me to accept at first. My doctor does want to start me on a medication similar to sertraline, it is called lexapro, but I am hesitant to start a medication. Did you notice a significant improvement? Has it gotten better at this point now? And how long have you been on the mirtazapine for? Thanks again for your help, and I hope that this problem will eventually go away!!!