It is different for every one. My friend always says she wouldn't be able to work while pregnant but I have no problem with it. I'm 37+4 weeks and plan on working until the very end so I can have as much time with my little peanut once he's born.
I'm just starting my third trimester and I'm in the same boat. Me and my man are strapped because of a 10% decrease in wages at work so now I have to find a job. Just know your limits and be aware many people may not hirer you if you tell them you are pregnant
You should probably check with your doctor if you can. Whether it's safe to work could depend on how your pregnancy is progressing, any complications, etc. They can also let you know any limitat ions on how much you can lift and things like that