help please

So ladies a few questions here right so my partner has 18million sperm count but fertilty doc said its fine aslong as theres more than 15million is this true everywere else says 20million+ but everything else like motility morphology and what not it's extremely normal...anyways he told us do it every other day so today glow says is my best chance and it was i got my ewcm i didnt have sex yesterday i did the day befor say about half 11 at night then i wome up 8 clock this mornin with loads of ewcm so i counted up the hours witch ment 33 hours as we did the deed between half 8 n 9 this morning but last month i rang them and said i got ewcm today but i did the deed last night do i have sex again they said no you got to wait 48 hours to let the sperm regenerate so i said well i got my fertile mucus i dont want to miss it so i did it anyway but obviously didnt work as i got my period so im just wondering because i didnt waot 48 hours i ended up doing it after 33 would that of messed my chances because they said sperm survives up to 2 days no matter what and each time i do it were topping it up sorry for the long essay but im confused would be very much appreciated if someone could answer me thanks X