Stopped the pill, no AF in 6 weeks?

I stopped BC pill on 10/22. AF was due around 11/3. I know with the changes in hormones it could mess my cycle all up but I tested last week and got a BFN. Since last Sunday I have been having extreme nausea several times throughout each day, headaches, and very mild discomfort (not really cramps) in my lower abdomen. I am planning on taking another test in the morning just to be sure there is no BFP. My question is for those who stopped the pill how long did it take you to regulate your cycle? I know everyone is different, I am just curious. I have just never had an issue with being regular, even after stopping the pill for baby 1 and after having an IUD removed.