It's wonderful to hear that you have found relief and that your stuttering has resolved itself. While it's always a good idea to consult with a healthcare professional and potentially get blood work done for a definitive diagnosis, it seems like the supplementation of vitamin B1 has been beneficial for you. In addition to continuing with your current supplementation routine, I would also recommend focusing on a healthy and balanced diet that includes foods rich in vitamin B1, such as whole grains, legumes, and nuts. Regular exercise and stress management techniques such as meditation or deep breathing exercises may also help support your overall well-being. Please reach out to me if you have any further questions or concerns. Take care and stay well.