Pieces of mucus plug? (No pic)

Hey Ladies! So tmi but it seems like every time hubby and I do the deed the next day I will have a piece of mucus in my discharge, looks like a string of snot. Has anyone else experienced this? I'm a bit worried. It's happened a few times. I've read that the MP regenerates but then I've also read that it's cause for concern so I don't know! Just wondering if anyone else has had this. Thanks!