I had a positive ovulation test on august 28th at 1:33 it was strong and definite. Had sex night before and Thursday before and and then following Wednesday . My last period was august 17th. I done a pregnancy test 10mlu ones and negative. My last cycle was 37 days long but I wasn’t using opks etc. So I’m unsure as to why so so late when I ovulated on 28th. I have 5 children and I know it can take time to show with tests but I’m certain I would know by now .