Went through a Bachelor's and a Master's with this stutter. The only advice I can give you is don't lose your confidence no matter how hard the situation is. I know it is hard AF. One time I was presenting my assignment in front of my class. I noticed three girls laughing every time they saw me stutter. I stopped the presentation, pointed at them, and asked “I’m sorry but d.do you guys h.have anything to add?”. The lecturer was a cool dude. He also asked them whether they need to add anything to the presentation. Those girls were mute as a... I don't know... Something mute. That was a huge confidence boost. From that moment on, whenever I walked into a class I'm thinking that I’m the badest MF in the town.