Believe the 4 negative HPT results. Periods can be late for a number of reasons, including being worried about why it hasn't shown up. Many women find activity helps bring a period. However, you can also consult with your doctor.
It is possible to get a false negative on a at home pregnancy test but it is not common. Go to your doctor and have a blood test done.
Pregnancy tests, especially early-stage home tests, are never 100% reliable.
if you have been confirmed as pregnant by the doctor - it is still possible in these early stages of pregnancy for tests to come back negative, i would check with the doctor to be sure.
A positive answer on a home pregnancy test means that you are pregnant and should see a Dr. A negative answer means that you are not pregnant. If you get a negative response and feel that it is in error you should wait two days and test again or see your Dr.
If you have had a negative blood test, it is very unlikely that you are 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.
It is possible to get a false positive on a pregnancy test, but highly improbable. I once went in the doctor after taking a home pregnancy test and the doctor basically said that he would not test again, because they use the same test and I was pregnant. But, I did get a false positive as a teenager and the 2nd test was negative. Take a 2nd test.
A home pregnancy test will show up most probably negative in this case.
I'd guess you aren't pregnant.
It is possible to lactate during pregnancy (I had milk that spontaneously came months before my second child), though you would have to talk to your health care provider to know if this is what is happening with you.
You could be pregnant, but if I were you, I'd go straight to my doctor.
If the doctor told you that you are pregnant, then you probably are. The doctors do a blood test which is way more accurate then peeing on a stick!