Sorry to hear about your situation. Without sounding patronising and judgemental, it is not uncommon for individuals to engage in pleasurable activity, in your case, masturbation, either as a distraction from depressive symptoms or to feel relieved of underlying psychological difficulties. Unfortunately it forms a cycle which individuals find it hard to break from. Although it may be challenging, you would benefit from making some lifestyle changes/routine by engaging in activities that distract you. If problems persist, please consult psychiatrist to rule out recurrence of depression.