so unhappy at work

Work is busy and stressful, I am a vet, that is to be expected. What is not expected is everyone at work talking to me and treating me like a piece of shit. One particular nurse has always been spiteful to me. She is sly as externally she seems very nice, but it is the snide comments and they way she talks to you. I had a big falling out with her this morning. She made me so upset and angry, I was nearly in tears. I rarely cry. I hate her for making me feel weak.

I am currently writing my CV and searching for jobs. I am concerned, I do not want to be starting a brand new job and be going through IVF. I spoke to the IVF clinic today. I will most prob have an appointment June and be going through a cycle in July. I have to give 2 months notice when handing in my resignation. It will all be going on when I will be doing IVF.

What is better?
1) being unhappy at work, stressed, miserable and going through IVF, if pregnant get maternity pay.
2) being stressed in a new job, potentially being happier and if get pregnant NOT getting maternity pay

I just don't know, I am so depressed. I haven't eaten all day, that is not like me!!