Cramping for a week need advice PLEASE

I started my period week 4 after postpartum bleeding my period lasted 9 days it ended on 4-29-16 I had sex with my husband that day the next day I was cramping as if I was ovulating (impossible I know) so I took a ovulation test it was negative only one dark line. On 5-1-16 I was cleaning my house I started to have pain in my uterus I had to sit down I went pee wiped an seen pinkish red color I took a ovulation test that day there was one dark line one light line. Through out this week I took a test an only seen one dark line the other was light plus I have had cramping on an off this week it feels like ovulation. I had sex with my husband on the 5-2-16, 5-4-16, 5-5-16 there was no pain during sex or after my husband said my cervix was open soft and low on 5-4-16 and 5-5-16 I'm really confused right now. I don't know when i ovulated cause my normal symptoms are cramping but I have been cramping for a week now. really need advice. (really trying to get pregnant)