Could this be a pregnancy?

I have been off the Depo shot for over a year and a half. My periods have been irregular since but have always been a once a month at least. This time around, I have not had a period in 8 going on 9 weeks. Even though I have irregular periods, this is not normal for me.

I have been having unprotected sex for the past year with my h2b.

I’ve been having “period pain” as in, sore lower back, cramps and headaches for the last 8 weeks but no period?

Has anyone else experienced this?