Why is my period so heavy can't leave my tampon in longer 45-60 min and have to wear a pad. its never been this bad and is there anything to help.

A few ideas: Endometriosis can cause this type of bleeding, as can a syndrome called vonwillebrand's. Thyroid problems and being too heavy or thin can cause abnormal amounts of bleeding too. Ibuprofen can help wtih bleeding, consider taking 600mg. You should see a doctor though for evaluation. Good luck!

Heavy is right !: At your age the most common cause is hormonal-likely not ovulating this month. But since there are many other possible reasons, you should be examined before treatment.

Massive period: A large, heavy menses requiring a pad to supplement a tampon needs a exam by a gyn md to evaluate, so make a an appointment.