It's okay to cry. It just proves that you are human and that you feel things. Please talk to someone about this. It's possible you have PTSD if you remember something scarring from the past.
Ok listen to me rn. Cutting is a very very bad habit to have. It's very unhealthy and the scars stay with you forever. Believe me I know because I do it tooo. I've been cutting myself for over a year and I have lots of scars and I do not wear them with pride. Your cuts are nothing good. They may help in the moment but when you get past it you'll be so ashamed in yourself.