Am I pregnant or not

Don't worry, almost everyone has done it at least once while on their period. Normally, the chances of you getting pregnant from the 4x's of having sex on your period are 0 to nothing. I know this because you said it's your 8th day bleeding which means it's the 8th day of your cycle. Woman don't ovulate that early meaning you can't have gotten pregnant YET from those series of love making. Even if you did ovulate RIGHT after your period (which is totally not likely), it's way too soon for your body to even register that it's pregnant.

Now,.... there is a different possibility. You could have been pregnant from the previous month and are now miscarrying. 50% (or some high number like that) of first pregnancies end in miscarriages and most of them happen before you even know your pregnant (aka... you have a really long period). So, as far as pregnancy goes, your probably not pregnant, at least not anymore. If I were you, I would see a gyn/ob... especially if it doesn't stop after 14 days of bleeding. If you feel dizzy or faint from blood loss (and trust me, it doesn't take much) go to the emergency room.

Other than that, I'm no expert on prolonged vaginal bleeding. Just do your research. But I'm fairly sure that your not pregnant.