True or false question??

Ok so me an my DH are TTC for about 5 months now and when we BD he keeps going even after he's already egaculated I'm not complaining at all lol but I worrie is that going to mess up the sperm getting to where they need to go should we stop right after he does because sometime I feel like a lot gets pushed or pulled out when we keep going. Sorry if this was Tmi but just needed to no