You are TTC and you just recently got off of the pill should you get a period 3 weeks after your first period like when on the pill or is it 4 weeks?

It can be 3 or 4 weeks or longer for your first period coming off of the pill. It can take several months or cycles for your body to be able to produce it's own hormones again. Some people's body's jump right back on track and they conceive in the first month before they even get a period and other women will have to wait several months to a year to be completely regular again and be able to time their fertility. Good luck!