I'm not an expert, but in my opinion, just forget about it it will pass. Maybe it's just the stress or something like that the more you think about it the more you'll get bad habits that are hard to delete. Why I'm saying this, is because I think I had a stutter a long time ago but it's gone and now I stutter bcs of habits and instincts I developed. May be wrong, in any case, I wish you all the best.