vaginapagina | Period is really late... (Reply)

Well... it looks like it's time for me to stop lurking around here.
My big problem right now is that my period is at least 2 weeks late... I have a quite irregular cycle normally, but it usually doesn't go any longer than 50 days. My last one started May 22, so assuming that my cycle took on it's maximum length... argh. It's damn late. I was sexually active around that time, but on June 3 my BF went away for the summer (and I broke up with him not that long after). We always used condoms, and to the best of our knowledge, they always worked properly, so I really don't think I'm pregnant. I'm kinda scared to take a test though.
So... my question is... What other reasons could there be for missing a period, or having that long between them? For the record, I'm 21 and in good health otherwise.