Stress at work - HELP!

I am currently 37.4 and I am experiencing so much stress at work. I planned to work until I go into labor but I'm just so fed up with it all. I can't even focus on the fact that I'm going to be a mother and new changes in my life because I am consumed. I only have about 3 weeks paid time off for maternity and the rest is all unpaid so that is why I planned to wait and work as long as I can. What should I do? Should I continue to work or step out early? This is all killing me and I'm caught between wanting her to come soon (so I don't have to go back to work and face these issues) and sticking it out 😕 help!