Any time you have sex there is a chance of pregnancy, but if you're bleeding now there's a good chance you're not pregnant. Implantation bleeding isn't extremely common. Take a pregnancy test to be sure.

How irregular are your periods usually? Have you considered birth control to help regulate?

i get them every 40-45 days. But i dont think this is my period. for one its lighter than normal, it started with two days of light spotting. And its still like that, hasnt picked up at all. Which normally by now it should be really heavy. i took a pregnancy test two days ago, but that was before the bleeding.

Your period isn't always going to be the same. Its freaky when it changes or is different for a month just randomly, but it happens.

Wait another week and test again.

Just i dont think this could be my period. ive been spotting for almost 3 days now. If it was my period it wouldve picked up and been heavy day 2. We had unprotceted sex the 22,25,27 & 29 of March. So im thinking this could be implantation?

Again, your period isn't always going to be predictable.

And I'm sorry, I completely misunderstood when you had sex. You're going to have to wait at least two weeks to take a pregnancy test.