Can't get a BFP!!!!

We've been trying for months and since we're mainly all women using this app and posting/commenting/replying me and my significant other don't use condoms-not that we can't afford them-but he doesn't like wearing them. And he ejaculates inside which is cleaned up afterwards but idk what to do in order to get a BFP. I was a week late last month and within 8 hrs after having sex my period came and we have yet to do anything since then. I really want a little girl. Any advice is greatly appreciated.