The female body is confusing!

I am ovulating this week( I actually think I already did). Me and my SO BD last night, and Friday night, and if I have the energy, tonight. I felt cramping im my uterine area and I felt a bit nauseous a bit before that. We've been unprotected for a year, but it seems as if my eggs are dodging his sperm. I don't want to force the issue of "trying" because it takes the romanticism and spontaneity out of making a baby (or sex in general), but it's so confusing to figure out why I'm not knocked up yet!!!!

(Also, I was on the shot from june 12 to April 13, got my period back in Nov. 13, which leaves us to present day. If this helps answer my looming lack of pregnancy.)