I don’t really know how severe your stutter is, or how others around you usually react to it, so what I’m about to say may be unhelpful/inaccurate, but I think that you have to really make the distinction of whether it is your stutter holding you back, or actually your relationship with your stutter. What you wrote here makes you come across as deeply insecure and ashamed of your stutter, which is understandable and are also feelings I have regarding mine, so I think that maybe the first step would be to change your mindset. You mention how you were able to speak fluently when acting, and I think that really highlights the potential of mentally transforming yourself. So, although this is very difficult, I recommend not letting your stutter define you. If there are opportunities in the future you want, or people you want to speak to, just try your hardest to go for it, and if they react negatively to that due to your stutter, they weren’t worth your time in the first place. Also, if you have any time I’d recommend acting again as a hobby. I used to do opera, and I remember during that period of my life I stuttered a lot less and was more confident/poised around people.