Okay I need some wise people that can help

Okay so I've been having sex for the past 5 months in hopes to get pregnant but nothing.🤷🏼‍♀️ out of all the pregnancy tests I've taken I've only had one positive but I guess it was a false positive... I haven't had sex in the last 4 days but when I pee and I wipe, there is this sticky stiff that looks like his cum.🤷🏼‍♀️ I've showered each time after sex.🤷🏼‍♀️ does anyone know what it could be?