You should see a Doctor, you may have a growth or tumor that needs attention.
The negative pregnancy test is the defining answer, regarding pregnancy - once your period is a week or so late - if you are pregnant, the hCG will be high enough to be detected.
It is even possible to get pregnant on your period.
. . . means that you arent pregnant.
No you can't be pregnant and still have your period. You can have a light bleed but not a period. As for the whole negative test thing, it could be a false negative.
If you are on/had your period your probably not pregnant, but do a pregnancy test to be sure.
No, a period and a negative HPT (used at the appropriate time) indicates no pregnancy.
You are pregnant
Yes
Pregnancy tests are not 100% accurate, but being that it was negative and you got your period, I'd say you are definitely not pregnant.
Unlikely - the bleeding probably was your period
Having your period means you aren't pregnant
A period usually means no pregnancy, if you are unsure take a pregnancy test.