Hello. I have a question and i hope someone can help me. Yesterday when i used the bathroom there was very little faint light blood on the tissue and then nothing the rest of the day. Then today I went to class and came back and i had lightly started bleeding but there was barley anything on the tissue after i used the restroom. I am on birth control and i have no suppose to start till next monday so i have another week. I have been on antibiotic which i know can make the birthcontrol not work correctly and i did have unprotected sex. I have read about implantation bleeding but im not 100% on it so im not sure if this is what it is or not. Can anyone help?