Testing

Hi everyone. I had my last visit from af 5/11-5/16. On another app it told me I should ovulate on 5/22 we had sex every other day or every 3 days after I got off my period until currently. I took an ovulation test on 5/22 and it came up negative and also one on 5/23 also nagative. It was a digital one so I just gave me the O and for no lh surge both times. Well according to this app I was suppose to ovulate 5/28. I've taken 2 pregnancy tests 6/09 and 6/11 because I was suppose to start yesterday 6/12. Both tests came back negative. I feel very crampy and I have for a few days now in my lower abdomen and a little in my back. I've had an awful headaches all day. I feel like I am going to start my period at any day but now I still haven't seen AF. What should I do? Should I retest or wait it out?