Got any advice for my situation?

I don’t get it. I really don’t, I’m supposedly a week late for my period (22 dpo if calculated right) but got a negative this morning. I don’t have stress, I’m literally just at home lately to keep my cycle less different. I have had very small/faint cramps and backache, as well as a moderate continuing headache. I’ve been eating a bit more (but I think that’s just because I’m fat and love food) and my bra feels more snug. Yet I don’t see AF coming yet. There’s a chance my timing could be off by some because when I stopped my birth control it did make my body either delay a little or come early. But I just want to know, am I still out this month? Or is there a chance I’m still in?