Period started a week early

Ok so this is a little long but im so confused.

My periods are like clock work only off by a day or so. Anyway last ovulation day in August had intercourse, period was supposed to start on 8/31 but ended up starting on 8/24 @ only 7 days after ovulation. Lasted 3 days then stopped a day then started for another 2 days then stopped and then finally finished on August 30. So my calendar shows my new ovulation date should have been last Wednesday but I dont remember having discharge or ovulation twinges.

I have been cramping, bloating, having sore breasts, really fatigued and this sharp pain in my left hip. Thought my period was going to start on sunday too, with how i was feeling, but nope. (i was gonna be ticked off if I had 2 periods in 1month, lol) Anybody have a similar experience? I dont know if its late ovulation or could I possibly be pregnant and it just hasnt reflected positive yet. Any thoughts?