Don’t judge 😓

Okay so don’t judge but me and my fiancé are both very sexually active and he finishes inside of me every time we have intercourse we have been trying to have a baby the past 3 months and still nothing... I’m so terrified that I may not be able to have kids of my own and that’s all me and my fiancé wants . He has a bunch of nieces and nephews that we take care of often and his face lights up when he sees me changing they’re diapers or feeding them and I’m scared he will leave me if I can’t give him a child... help what should I do ? Is it normal to have sex this much and still not end up pregnant ? 😓😭