Period pain with no period

Girls… does any of you experience period pain (espesially around your genital/anus) when you're not on period? I do, and while it's not everyday but I'm afraid if it's something serious. The scale of pain is around 3-5 out of ten (with ten being the most painful that I'd cry).

I'm considering telling my mom but I'm afraid she won't take it seriously and even if I try getting it checked, I'm afraid it's not free and I don't have any money yet.

Please if any of you experience this, tell me is yours turn out to be a bigger problem, or maybe how to solve this issue