Why would i have a period a week ahead then its suppose to be?

Ok so I am on birth control and been takeing it pretty normal, taking the birth control my period isnt suppose to happen for another week but I have it a week early and kinda weird why this would happen, I took a preg test and it was neg.

So I had...

sex with a guy on October 31st, then again with a different guy on November 8th and then again with a different guy on November 17th. No im not a slut please dont think that.

I have been on birth control for about 6 months now, and I am suppose to get my period in a week with it but I started having my period 2 days ago instead even though its not time for it, so I started to think I could be pregnant, and took a test this morning and it was negative

The guy I had sex with in October, we used a condom and birth control and the condom didnt break, so I know the test woulda been + if it was his I would be a month preg.

But with the other to guys I could be like a couple of weeks right, could I be pregnant even though the test came back -

I dont get why I would have a period when its a week ahead?

umm you should def. wait till about a couple of weeks, and make shure that your period doesnt come first and if you does, nt den taka preggy test. stay hott.
xoxo.

Ummm... if your having you peiod your not pregant. A period is basicly when the egg is coming out and it can't get futallized now if it's comming out.. Unless you have unpotective sex and he cums inside of you. Now... you need to remember to take you birth contol or if you make a little mistake your gunna end up that way.

umm just like the one person said. if your having your period your deff. not pregnant. and if you skip just one day with birth control it screws up your entire thing. so be careful not to skip.

actually you can get your period and still possibley be pregnant it is very rare but it does happen they only way that I know this is because my dads girlfriend is a nurse. But I think that it is just because you tend to forget to take your birth control so there for your body does not know what kind of rutine to adapte to just start taing your birth control every day and you should be ok if you want to go to the doctor just to make sure hope this helps.

hey if you have had your period then you are okay because the blood or discharge is just basically skin that ylu are not using for a baby to develope in sooo you are okay you are not pregnant but I might be wring soo you mite want to get a pregnany test or something

na your probably not pregnant its happened to me because im on b.c. too adn your dose probably just isnt strong enough, so your period must have broke threw the medication, you should go to the doctor and ask for a slightly stronger dose or a different brand completly