I'm a person who stutters and an SLP who specializes in stuttering. I also have a 4 year old who stutters. The first and most important thing I'd say is to stay away from Lidcombe! Not all kids respond negatively to it but many do (sounding like your child is one of these). Lidcombe also doesn't increase the likelihood that your child will recover from stuttering when compared to other less-risky approaches, so there's really no benefit to it that you're not getting with anything else. Some SLP's will throw out the "Lidcombe has an 80% success rate" but that's deceptive because 80% of ALL young kids who stutter will recover anyway. There are lots of things you can do as a parent to help - and one of the most important things is you being able to talk to an SLP regularly to grow in your own understanding of it and decrease your anxiety (by the way, you're not weird at all for feeling anxious about this). I'm happy to share more if you'd like, feel free to PM me if you want.