Help please - Seeking advice as a parent

Help please - Seeking advice as a parent For context my son is 3.5 and we do not have any history of stuttering in the family. He will be 4 in March. My son started stuttering at the beginning of his sentences around June of this year. After a month or two it passed and we chalked it up to developmental and we weren’t too concerned. In September he started preschool a for a couple hours a week. Shortly after the stuttering came back worse. It was like a flip of a switch one morning it was back more than before. He would repeat the beginning words or sounds so many times “I I I I I I I I want to go to the park” “wh wh wh wh wh what are you doing”. I talked with a couple local speech therapists after a referral from his dr. We did a consult and the SLP said it could be developmental or be a real/consistent stutter but that it was hard to say for sure at this age. She mentioned his stutter was not considered typical for development but that he also has some positive factors to hopefully indicate he’d grow out of it. We decided to give therapy a chance for a number of weeks and reassess from there. The speech therapist has us trying the lidcombe (unsure on spelling) program and at first he responded positively but now he doesn’t like to talk about his speech and I’m worried this just made it worse. Some days he is better than others but overall he seems to be stuttering more often than not now Before speech he did not seem to notice or be bothered by his stutter, and he did not have blocks or any tension. We have done about 5 weeks of speech therapy but I don’t feel like it’s done anything. I feel his stutter is worse now. He is now stuttering multiple places in his sentences as described above and just the last day or two I’m starting to notice tension with it and that he is getting stuck on words now and can’t say it. Just earlier tonight he was trying to say “good night” and “love you” but he was so frustrated he couldn’t get out either and he just looked at me and said “I can’t” this happened yesterday once too and he had never had this before Any advice for me? How do you find the right speech therapist or know if that’s the right route to go? We live in rural MN, so I don’t feel we have a lot of options for speech, unfortunately. the 3 slps I talked with did not seem to have a lot of experience with stuttering. I just want to do what will help him the most. I find myself having a lot of anxiety worrying about him and his stutter. I love him so much and I worry about how this will impact him because as more time passes it seems less likely to be something he’ll grow out of based off everything I’ve read. I really worry about bullying etc. he’s a sweet but sensitive boy and I just want the best for him. Thanks in advance for any advice.