Why im suffering conteneus bleeding doc..now 1month i have a menstration..im going to clinic to ultrasound but no findings?

Persisting period: Stress can be a cause of persistent period if ultrasound was negative. Would also check TSH, T4 and hormones of progesterone and estradiol, as well as clotting factors like Van Willebrand (though that is less likely as it would have always been a problem). Sometimes if all is negative birth control pills for a few months can help reglulate bleeding.