I Had Unprotected Sex 3 Times The Week I Was

I had unprotected sex 3 times the week I was ovulating. Ive been trying to concieve, but have had no luck. My period was due 2 days ago and up until today Ive had no cramping. My breasts are sore, my nipples are sensitive, and now I have weird cramping on the left side, where my ovaries would be located. I have some slight pink bleeding in the cervical mucus. Whats going on? could it be my period? Pregnant?