Hi! I Am A 27 Year Old Female. Last Jan.

hi! i am a 27 year old female. last jan. 25 i had my period. it was rrally light, just a few drops of brownish spots. on the 3rd day it became heavy then light the next day. the again i bled heavily the day after. then i continued to bleed for 3 weeks. i decided to visit a gynec and i was advised to take primolut-nor for 21 days. the bleeding stopped then. on the 14th day of taking primolut, i bled again, like i was having a regular period, but the blood is thicker and there are blood clots. i am also experiencing pain in the lower left abdomen. i don't know what to do now.