Good afternoon mums, please help a sister in need,my sis had her period for 2days which was very heavy unlike before, it used to be 5 days and it flows normally,and the color was now like a diluted zobo drink. Throughout Tuesday which was supposed to be the third day of her period there was no drop at all and she had sex with husband that same night which led to flow of blood mix with water and a bit much, my question now is that hope nothing is wrong with her and what could be the cause of period that looks like diluted zobo drink (or could it be implantation bleeding) and the flow after sex. She's trying to conceive . Please help