My last period started on october 10th and ended on the 15th. My husband and I then had intercourse on the 16th. I noticed yesterday that I had light spotting while using the restroom it was a muddy pink color and the texture was like that of my period flow. Which leads me to believe it is implantaion bleeding. But from what I have read implantation bleeding happens after ovulation? Which I don't believe I have ovulated yet for the month. My periods are very consistent and I have not experienced bleeding like this so early before my next period. Any ideas or comments on what this is? I hope its what I think it is. Thanks.