Confused

Lydia

So I thought I ovulated July 30th I got what I thought was a positive ovulation test. We had sex 2 days before this positive and 4 days after. I stopped testing once I got the positive as well. However I seem to be cramping quite bad on my right pelvis area. It felt like period cramps so I was concerned that maybe I didn’t ovulate when I thought. However I took a opk just 5 minutes ago and it doesn’t look positive. If I did ovulate July 30th I’d be 5 dpo I believe. Has these happened to anyone else? Pictures are of my positive test on the 30th and the one taken tonight.