How To Treat Menstrual Irregularity?

I ve been bleeding on and off for almost 2 months. I went to my family Doctor and put me on Primolut N. Even thou I was taking these pills nothing seemed to change, except I started to have back pain and cramps. After being on Primolut for almost 3 weeks. I went back to my family doctor asking to be refered to a local Gynecologist. I made an appointment and was lucky enough to see her the next day. After general questions and examination. She gave me 3 repeats of prescription of Primolut N to stop the bleeding and a prescription for the Pill to start my period in a regular cycle and too see her back in 6 weeks of being on the Pill . That same day I did blood tests and had a referal for an internal scan for when I stop bleeding. All she sed could be possible PCOS for being overweight. I have to do hormones test next time I see her. I am also on Iron suppletments So now being on Primolut N for a month. I still find I am bleeding on and off. Just recently I woke up in the middle of the night with cramps I was also wet and thought I had urinated myself in my sleep. I got up to go to the toilet to find my underwear and pjs were covered in blood. I had a shower, put a pad on went back to sleep. I woke up in 3 hours my pad was full with little clots and big clots and this time the cramps were worse. I thought having a long hot shower would help for awhile. Too my supprise my vagina was hurting and for some reason I just Pushed . I felt a long, thick sluggish mass come out. I looked on the ground and there was a large sluggish clot, I don t even think you could call it a clot because it was the size of half my palm. It was dark red with grey vain look ends. My question is what was it? could it have been a miscarriage? should I see a different gynecologist? Am I suppose to get my period while on Primolut N? Should I talk to my gynecologist about this? Can I still exercise? Can I use the duromine to help lose weight?