I'm sorry you are having to deal with this. I don't know as I really have any answers. I've never been diagnosed as having OCD, although I certainly do have some OCD-like behaviors & thought patterns. Anger is also something I'm familiar with. Here are links to 2 articles, from PC's archives, that offer suggestions for managing one's anger. They don't relate to OCD in particular. But, hopefully, what they suggest can still be of some help:
How to Manage Your Anger
Dealing with Anger Constructively
My own approach to handling my anger is to meet it mindfully with compassionate abiding. Here's a link to a description of the practice just in case you're not familiar with it:
Relieve Distress By Allowing It: Compassionate Abiding 101 | Mindset: Perspective Is Everything
May it be of benefit.