Brown discharge during pregnancy

Richelle

Hello, I’m 13 weeks pregnant and today I notice brown discharge. I had sex two days ago in a really long time so I don’t know if that could be the reason. It’s not heavy but when I wipe, the paper tissue is slightly brown. I just used the bathroom and there were traces of it on the tissue. Like a tiny stretchy blood clot look a like but brown. It was very small. I tried putting the tissue by the entrance of my vagina to see if anymore was up there and there were just a few. What could this mean?