C.B.
My SIL and I both had tongue tied babies born 5 days apart. We both had terrible pain with nursing despite lactation consultants help. I had my son's "clipped" at several weeks old. I still had some level of discomfort nursing till he weaned at 17 months. My SIL did NOT clip her son and continued to have discomfort with nursing till she weaned. My nephew, now at 3 has an extreme speech impediment. He goes to a speech pathologist 4 days a week for therapy and will now need his tongue clipped in an effort to improve his speech. Because of his age he will need to be put completely under.
It may not seem like it now, but big picture, in my opinion, you made the right decision.