Hey, I'm 6'7, 37 male and Stuttered since I was 2. It's hard when you've had interactions like this, I know it can be emotionally draining and spirit crushing. Don't blame yourself, keep trying and remember that it's only you who will overthink it. Give yourself some time to breath and when ready, try again. If I know I'm going to stutter I let people know and it often helps as I find part of the worry for me is what will they think of my stutter. Good luck and keep smiling!