Very very irregular period.

Vero
I barely ever get my period I could go over 4 months without getting it, obviously it's not normal that it happens and when I do get it it's for less than a week but now I got it, and I've had it for nine days. And I've been trying to get pregnant also and we don't use protection, not at all. And I started getting my hopes up bc nothing happens. So I just gave up. What should I do? Please answer freely but respectfully, thank you.