My situation is quite alike, except that if I'm nervous, I stutter alone, and if I'm relaxed, I can speek to anyone without problem. But I don't really think there are any cures for this kind of stuttering, however, I use some techniques what I find helpful. ​ The first is to know loads of synonyms. If I feel that the next word would be too difficult in a sentence, I simply replace it. Of course, there are situations, when it doesn't work, or at the end of the patchwork sentence, you don't remember what was the subject, etc, but still, it works. Then, you can make rhythm with your finger or your foot, which can be barely seen by the others, but it gives you a guideline during speaking. If I have a giant cramp on which I can't get over, I make compress on other parts of my body (ex. hands, thighs), as if I'm transferring that tension from my throat to somewhere else. ​ Plus, what is the most important for me, is the mindset. I have to rev up myself, I have to become enthusiastic, feeling that I WANT to speak, and people want to hear me. ​ And let it go. Don't be worry about what if you're going to stutter. Because probably, you will. You can' t do anything against it, and yes, that' very irritating and ashaming. But when you start to accept its existence, the anxiety will decrease, and speaking will be way more easier. ​ I hope I could help a little, wishing you the bests.