The day after my period ended, my boyfriend and I were fooling around and he finished on my stomach. I'm not too sure how much his penis came in contact with my vagina. Now it's two days early for my period and I had intense stomach cramps through the day and found that i had bled on my panty liner. It was about half full and a bit of a lighter red. I went home and took an advil for the cramps. Now i've nearly stopped bleeding and the blood on my pad is a pink colour and barely there when I wipe. Does this sound like implantation bleeding?I'm not sure if the advil had any effects on my flow. But I'm concerned and any responses would be much appreciated. Thanks!