Relieving Tension?

Relieving Tension? Like a lot of people may have, I have more of a covert stammer or interiorised stammer. Working really hard to be fluent and most people won’t really pick up on it aside from some weird habits maybe. However, and in the past too it’s happened, in the past couple of weeks it just seems worse. Stress sure maybe and couple of other factors may be exacerbating it and I know it’s a vicious cycle. But has anyone any tips on relieving tension? It seems like my chest and throat are all closed up and muscles here feel really tense impacting heavily on my speech of late Cheers