I left one job and started another when I was pregnant with Noah. I didn't tell my employer at the second job that I was pregnant. 3 weeks after starting at my job, I lost Noah. It was really awkward to have to explain to my boss that I was needing time off because I had lost a baby at almost 21 weeks pregnant... obviously it was something he was unaware of and I felt so awful for not telling him.
Anyway, my boss was lovely and I stayed working there until I was 4 months pregnant with Harrison, and it was only because they were closing my house down and building a new one (I worked as a display home hostess)

I agree with Kirley64 that Xmas positions would be perfect for you. I am actually considering applying for some myself

All the best for your job hunting and your pregnancy