When did I more than likely conceive?

My husband and I were not TTC,

so I was not using opk. I’m 7 weeks pregnant today. I thought I was having my period on April 23rd, but I’m assuming it may have been implantation bleeding (light spotting). I did notice on April 9th I had a large amount of CM and took a picture, so I’m thinking I ovulated around the 8th or 9th. Both days seem to be out of that window as I’ve always heard sperm can live inside the body for 5 days and 12-24 hours after ovulation. Thoughts?