I think you should give it more time, let your body get used to running. Also, I think it might work differently depending on how far you're running. I'm a long distance runner, and I think it's helped my stutter a lot. When I compare long distance running and shorter distance running (anywhere from 1-6 miles), long distance seems to be more therapeutic and relaxing, as contradicting as that may seem. I ran cross country in high school, and every time we would finish a practice or a race I was completely out of breath and my body hurt; this didn't help my stutter at all. It wasn't until I finished high school that I realized how fun it was to run long distances (7-20 miles) and how therapeutic it is. I always finished these long runs feeling relaxed and energized instead of tired and out of breath. I learned pretty early on that it took me about 3-5 miles, which is what we were running in cross country most of the time, to get used to running and get to the point where I was breathing comfortably and my body felt, essentially, the same as walking. Having 7-20 miles to just think about things is incredibly therapeutic, and I've found it that it keeps me relaxed throughout the day. Really though, I think you need to give yourself more time for your body to get used to running. In my experience, long distance running helps my stutter, whereas shorter distances make it worse, if anything. I hope this helps. Let me know how it goes for you!