How do I tell my husband😓

My husband and I got married almost a year ago. He knows everything about me except one thing. I have a bad stuttering problem since I was 9 years old. I’ve kept it away from my husband or at least tried to because this embarrasses me more than anything. I’m really so ashamed I have this. I can’t do things on my own and that’s what kills me inside. I can’t speak on the phone, I avoid making important calls/appointments because I cannot talk. It took me 25 minutes just to make a doctor apt before. He’s in the service so it’s extremely harder because I know I’ll have to do things on my own without him being there. I worry it’ll never go away, it gets worse and worse ever since I was a young girl. How do I tell my husband I can’t do this and that? It’s so sad to me to tell him that, I don’t want him to worry about me and I know he will but I honestly feel like crap talking about myself like this. Idk if I can ever tell him, my speech therapist says I need to but I just don’t know how, I’ve never been so ashamed in my life than telling my husband my condition