Self pleasure/ masturbation is a normal thing and it has health benefits of it’s own .frequencies you are mentioning is not excess either. I would not advise to interrupt anything which is a normal thing, unless it’s causing any physical trauma or mental distress . If you still have problems then

Venlaflaxine - the medication you are treated with ( Veniz xr 75) is an anti-depressant preferred for younger generation as it is more compatible and doesn't effect sexual desire/libido. This is not meant for the anxiety disorder alone however a compulsion to masturbate in itself describes a reduction in threshold for frustration. You do feel irritable and lack motivation because of the depressive Episode. The drug itself takes a few weeks to take its full effect on depression and anxiety. The thought process that causes compulsive masturbation is important to target.

It seems u r suffering from OCD How long are u taking venlafaxine