Quoting FosterFamilyMomma:" Normal? No, not at all lol. Since I started at 13 they have never been regular, and it is not uncommon ... [snip!] ... for the past 3 months, every month AF has visited, but I am late again by 4 days now. Pretty sure I am not preggers though. "
There is a reason why your periods aren't regular and it really isn't "normal" to go six months. I've gone almost a year before. My doctor said I should have at least 4 periods a year to help prevent against endometrial cancer.
I have a messed up reproductive system (well I have a lot of issues. A whacked out thyroid, auto-immune issue that involves severe food allergies, a metabolic disorder that hinders my ability to properly absorb calcium, and I hermorrhage a lot with my periods). The doctor recently suggested that I may be perimenopausal and I'm 32.
At one time my periods did normalize and I could count on the them like clockwork and I got pregnant by surprise! lol I weighed 220 and am 5'5"