I need help!

I missed two birth control pills in a row. When I realized it, I took 2 pills, and then another at my scheduled time before bed. I started bleeding the day I missed the pills, it only lasted about 3 days, super light flow.

Continued to take pills as directed, then I had some mystery bleeding 1 week laterish. Again, super light only lasted like 2 days.

I did not get my period on my usually date in February. And I’m not sure if the bleeding after missing the pills was technically my period.… My BF and I don’t use any other protection aside for the pull out method, if that even counts.

I’m still super worried that I could be pregnant. I took a test yesterday, came back negative. But my hips have been sore and I have been cramping a lot. BUT I have been going on walks for exercise. I am 10 months postpartum, haven’t lost any baby weight, I’m actually heavier now then when I was pregnant…. Maybe that could be the cause of the hip soreness? Is the cramping all in my head? Any advice/words of wisdom are VERY appreciated.