AF hasn't come

I was supposed to have AF Friday sometime. Me and my boyfriend are trying to conceive and I've been off of birth control around a month and a half. I haven't really had any period symptoms that I usually have. The last few days I've been having bad migraines and my breasts are extremely sore. I took two tests, one last Tuesday and another Saturday, both were a BFN. I'm not sure what to do next. Help?!