Ugh plz help me

I don’t know exactly where to start. I have bd all cycle to try for baby. But I traveled when af was expected and now today I’m late and idk if it’s cause I could possibly be prego or if I just threw my cycle off by traveling. I have had cramps but they’re different cramps not my normal pms cramps. ( could all be In my head) but my boobs are still killing me so doesn’t that mean I still have a lot of Progesterone? Because they hurt really bad then before af they just stop.