I agree Fast foods wnt discriminate u being pregnant just do something like being cashier and no heavy lifting.. There is this website called indeed.com and it list jobs available for preganacy women just put in ur area code.. It will also list ppl who are seeking baby sitters. Some having requirements while others just need someone available whenever.. Just have to look into it.. Good luck :)
If your really looking to make extra money fast food places are almost always hiring and normally they don't have an issue with you being pregnant, not to mention normally there are plenty of people around that they can do all the bending and lifting for you so you won't be putting your body through as much of a strain
Try temp to perm jobs , maybe they will hire you ... And also there is lots of programs out there that would love to help you out .
Try applying in a baby store maybe they will hire you without any problem :) goodluck
Have you thought of becoming a nanny?