Very irregular

Kyla
I'm having issues with my period.  I thought I was finally getting regular, but then I'll be a few days late (up to two weeks) or be off for five days and then on again. I have a 9 month old and stopped nursing at 5 months. That's when this all started. I feel tired, bloated, cramps (including after sex) and headachey. Has anyone ever experienced this? Im not in birth control. I tried them a few times but my body didn't do well on them.