Confused!!!

I am so regular with my periods that I'm thrown off right now. Unless I ovulated late, my "period" was 3 days late and I'm always on time. They are always heavy periods but this time it is much lighter than normal. It feels as though I keep having to run to the bathroom to check. I was extremely nauseous yesterday morning and slightly am today but never experienced nausea with a period. I just feel different this time. Anyone experience anything similar and/or still got a BFP?