Hey, Im 20yrs old with no children. I suppose to have my period on the April 15 but when I used the restroom yesterday afternoon I noticed there was blood on the tissue but not in the toilet! When i went again last night there was the same thing with a few clots in the toilet. Today in class I felt as if I had come on my period and went to check and yep there was some blood but it was dark like a brownish red instead of the pinkish red yesterday. It feels like Im on my period but I never came on early before. There is not a lot of blood as if it was my period tho and Im a heavy flower lol. My last period was March 14-17th. After the 17th my boyfriend and I were having sex like crazy until now. Im confused on if this could be implantation or just an early period. I went to see my school nurse and my test came back negative but she said it could be too early to detect and she knows for sure its not a miscarriage because the test would have been positive. Any thoughts??? Help!