If the techniques never help at the only time you really need them, they are definitely the wrong ones. This problem is unfortunately common bc most SLP receive no training in treating dysfluency and do not know how to help covert stutterers who are mostly impacted by blocks, panic and avoiding. The good news is there are tangible steps you can take, starting right this minute, that are likely to help quite a bit. The work is hard, but if you do it, the fear probably will go way down and will stay away. Look at my profile to see my post about it.