In Feb my period was late, it came on Feb 25 - March 4 it was really heavy than usual. After that period I didn't had any other period besides that one. It has been 2-3 months since I didn't no period, I don't know if I was pregnant I took 7 hpt it was all negative. The 17 of May I had light blood it was nothing serious than two hours later I started bleeding heavily. So I don't know what could be wrong, I need help am stressed and worried. Someone HELP me, I need answers.

You will get your answer when you visit your doctor for a blood test to either confirm or rule out pregnancy. We can't give you an answer over the internet.

There are too many possibilities to list, so all you can do is see a good gynecologist.
Try not to worry, because many conditions are treatable. You could even just be having an unusual time of hormone changes. You could even have been pregnant once or twice and had an early miscarriage. There is just no way to know. If you don't want to get pregnant, I trust that you will get on the pill.