Was this my period or something else?

I had a period on may 31st which lasted 7 days. I ovulated on June 13th. My husband and I had sex on the 11th through 15th. I started getting headaches, feeling nauseated, having cramps, and having weird feelings in my abdomen around the 22nd. On the 25th, I took an hpt and it was neg. I started bleeding really heavy on the 26th which lasted til the 28th and today there's hardly anything........just a little pink. Do you think this was my period or something else?