VERY VERY VERY rare. If you have a period on top of a negative test I would almost 100% say that you are most certainly not pregnant and just having your natural flow. On the other hand, if you are feeling sick and not right after your period, then get tested by your gyno and see whats up.
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.
You should see a Doctor, you may have a growth or tumor that needs attention.
. . . 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