My husband hates when I talk for too long

I was diagnosed recently with ADHD-i. Everything is just now starting to make since I’m my life especially when it comes to all the problems in my marriage. Almost every issue my husband has with me revolves around any adhd symptom I portray and I’m just now coming to this realization. I’m trying to work on a lot to better our relationship but I’m also trying to help him understand my diagnosis since he’s also very oblivious to it. I keep a lot inside for too long so when I’m finally able to let it out, I can’t stop. Recently I started to excessively express my emotions and i guess I get a bit erratic and all over the place when doing so. He’s been cutting me off and saying he just “needs a break”. It hurts to hear bc I feel like he’s shutting me down but yet, I do understand that I may not be giving him any room for an input. He says the talking never ends and that he doesn’t ever get a chance to speak and when he does I still cut him off. The biggest problem he has with me especially in arguments is me cutting him off, but it just feels so out of my control most times.

How do I fix this, or manage? How to I explain my diagnosis to someone who is somewhat traditional and came from a family who isn’t fond of medication for mental illness or looks at it like “there’s no excuse”. I wanna add, he is open minded and is supportive of me being medicated but it’s also something foreign to him. I wanna make sure I can help him understand my diagnosis better so that we can work better together. How do I do this??