So my period came a full 4 days early, I'm never early, and started out of nowhere since I usually have cramps for like 1/2 a day before the bleeding starts, seemed like a normal period otherwise, lasted 3-4 days as usual, now I'm getting cramps, a full week before I'm supposed to ovulate (on the new updated schedule since AF was early) so like, what's going on? Sometimes I cramp from ovulation but like I said, it's at least a week earlier than it should be. I've also been feeling like crap, not specifically nauseous but just crappy, overly tired (I fall asleep on the couch every night, last night I passed out for 5 hours on the couch) and I'm finding that I'm starving every couple hours, even though food doesn't really sound good to me. Is it possible to be pregnant even though I'm pretty sure I had my period? What else could it be? Why is my cycle so weird after a lifetime of regularity?