Period or implantation?

Hi everyone, first off thank you for taking the time to read and respond to this post! Yesterday morning I woke up and when I went to the bathroom I saw blood, wiped again and saw blood so I was like must of gotten my period early since I’m due October 4th. I put a tampon in a few hours later there was just like pink very little in the tampon. Since then not a single sign of blood just wet. Could have it possibly be because of sex? My husband and are are TTC so I’m not sure if it was break through bleeding or possibly implantation.