Help!

Baby • Almost 33 and FINALLY pregnant with our 3rd after 3 years of trying with medication help! I got pregnant on my 2nd cycle medicated! ❤
I got a positive ovulation test at like 5pm on June 25th ( was intimate either the 27 or 28) but my period was due July 2nd for my very regular cycles. I am very regular 24 days. I ovulated wayyyy late. My periods are never longer than 24 days :/ took a hcg test on July 2nd bfn :( don't know what to do next. If I did conceive on June 27 or 28 how soon would show a BFP?