Conception!!

Hi guys!!! So I recently found out that I’m pregnant I’m around 5 weeks and 3 or 4 days according to the apps, I really need help trying to figure out what day I conceived, if you ladies are able to help me with that! My period was from April 26 -May 1 or 2nd and my fiancé and I had intercourse the first and second week of May maybe three or four times around ovulation from what i can remember. I also had intercourses may 17th and i had my first faint positive test may 20, then a BFP may 22. Is there anyway I could’ve got pregnant on May 17th and had my first positive on the 20th just 3 days later???? Please help me me figure out what day conception happened!! Im Really worried it was around the 17th but I’m not sure!! Please help me figure out if it was before may 17th or on may 17th!!! Thanks!! 💕🙂

If it helps my blood hcg test on may 24th was 52 and may 26th was 124