This is going to sound stupid, but I didnt have this problem until about 2 years ago. A few months went by with me struggling to say my name and feeling very embarassed, and I told myself I would train myself to say it again. I started putting myself in situations that required me to say my name. My go to was mobile ordering food. They ask your name almost every time in order to get your food. I struggled taking 5 to 15 seconds to get it out, but after about 6 months I could say my name again with no problem. other techniques was introducing myself to people saying my name over and over again till it sounded unatural. You will get your name back, it will just take practice.