Postpartum sex TMI

Okay so my bf and I did the deed 4 weeks 1 day after I gave vaginal birth. I only had to get 2 stitches and I hadn’t bled in a week and honestly I just couldn’t wait lol since then we’ve only had sex 2 more times and today when I went to the bathroom after everything was fine but a few hours later when i went again when I wiped I had like a mucusy string? Sorta like if you have to get a booger and it has a trail? That consistency... I know this is way gross but I’m a FTM and I’m worried. I don’t feel any pain or smell anything and there is no blood. My 6 week PP check is Tuesday just worried ... probably should have waited