i had my period feb 19th 09.... i did a pregnancy test last week was negative

iv had real sore breasts that have only just stopped hurting.. i thought i came on my period yesterday was dissapointed,but since the lil bit of blood i had in my pants iv not had anymore blood ?????
i seemed to have irregular periods from sept as i came off the depo then, but since november08 they seemed to straighten out again..
but its been 39 days now since my last period??

i had sore boobs but now havent..neg pregnancy test..and bled a lil bit yesterday and now nothing..
can anyone help give advice or anything? thanx xxx