Kind of tmi but I've been wondering...

Monika🎀
Does anyone else have an issue of when your SO finished inside of you, some of the sperm drips out from inside of you? Tmi I know but I am just worried that there isn't enough sperm staying inside to fertilize the egg.... I've gone as far as propping my bottom up with pillows and everything but it comes out no matter what position we use! Wondering if this is why we keep getting BFNs? Does this happen to everyone?