I have heavy bleeding last 2 months in periods...

I have heavy bleeding last 2 months in periods time and not stop bleeding with blood clots up to 10 days so which department in medical I have to go and check?
you have to visit and consult OBGYN doctor , and surgery doctor or internal medicine doctor may be consulted 
what are the possible causes ?
1. Hormonal imbalance 
2. Some medications side effected 
3. uterine fibroids
4. ovarian cysts 
5. incompleted miscarrige 
what are the needed tests ?
1. physical examnation by doctor 
2. productive hormones tests
3. blood test
4. ultrasound imaging test
5. endoscopy for productive system ( if needed ) 
General advices :
1. get a healthier meals 
2. exercise 
3. avoid stress 
4. avoid smoking 
5. have plenty of rest 
6. make sure you are not taking any medication that may effect your period as a side effect