Thank you for your query.
Let me summarize the problems with you:
1. Dull pain in abdomen since September
3. Heartmurmur which has not been specified
4. High blood pressure
off and on
5. Hypocholesterolemia, low vitamin D and low calcium levels
It is difficult to suggest a cause for the pain in abdomen. I suggest that you discuss this issue with you doctor and get a ultrasound
of your abdomen done. However, with all these issues that you are having it is best to follow your primary doctor's advice so that you remain in the best of health. You should also work towards reducing your weight which should make you less tired and dizzy.
I hope I have answered your query to your satisfaction.
Wishing you all the best.