I spotted a few times during my first pregnancy, and none of them was after sex, I told about it to my doctor, she said to not worry, unless it gets heavy...
No i havent but i just got off work and it was literally like small dots after i went to pee and its already stopped its the first time ive spotted any at all since ive been pregnant so it took me by suprise
Call ur doc to be safe but it sounds like nothing serious.... did u have sex recently