Your menstrual history suggests that you could perhaps be suffering from metropathic cycles and the fact that you are obese points to the suggestion of polycystic ovaries
as the possible cause. This needs further evaluation and proper management as prolonged heavy periods
can deprive you of iron reserves and cause anemia
. The fact that you see bleeding after masturbation
suggests two possibilities-trauma to the local parts or hormonal
influence. In the current scenario, you need an evaluation by a specialist in person fr further management. Please maintain a healthy BMI, do regular exercise and have a healthy diet. Hope this helps.