So this weekend I had sex with my bf on Saturday forgot to take my pill that night had sex again Sunday took the pill at 8:30 that evening took my Sunday pill same day at regular time bout 11:30 that night it was the sixth pill in the pack it has been four days since and today I noticed some very light brown vaginal discharge it is too early for that to be implantation bleeding right? Is there anything else that could be cause this?