I have a very similar situation to yours and I completely understand you. I've spent my whole life being afraid of all social interactions (doctors, shops, school, university, work, phone calls), and I can't say that I've gotten rid of my fear, but I’ve definitely learned that it gets easier with time. I hate to admit it, but when people say you have to throw yourself into the fire and it will get easier, they’re right. For years, my biggest problem was that I didn’t believe I was capable of doing anything, and each year I would postpone looking for a student job. But this summer I started working in an office. The job doesn’t require too much talking, but it definitely requires more than if I were locked in a room as always. People will realize you have a stutter and they will accept you as you are, and after some time, they won’t even hear it anymore, nor will they care, trust me. There will definitely be bad days, but focus on the good ones. Try to write down your successes every day and focus less on the failures. Don’t let your stutter win.