Help!

So this is probably a very stupid question but I just can’t find a solid answer lol… when you BD throughout the fertile window, does the sperm from the current day wipe out/replace the sperm that was left in there from the day before… or does it just add to the “pool” of sperm inside of you and give you more chances to conceive.

I had a chemical last month and then didn’t conceive this month and I find myself regretting BDing on the last day wondering if I hadn’t would it have worked out with the sperm from the day before. Sounds ridiculous but TTC is making my brain go wild especially with the chemical 😬😬 thanks!! Baby dust to all 💕💙