ive missed 3 periods and i have done 5 hpt, but they were all negative? am i pregnant?

Three months without a period is something that definitely needs to be checked with your gynecologist, no matter what are the chances of pregnancy. But, since all the tests are negative chances are you are not pregnant. By now test would definitely show if you were pregnant. How was your period like before this? Was it also late or was it regular? Period usually stops when your female hormones change and there can be many reasons why that happens like polycystic ovaries or even weight loss. That is why you need to see a doctor because most of these things are easily treatable.

Well i had 4 négatives and then went to thé doctors and got Blood work which showed that i was 10 weeks So i would advise you to go to your doctor