What are the chances of not obtaining my clearance and having to reclass?

I am three days away from graduating from AIT as a 35F and just learned (as I have started out-processing) that I still don’t have my security clearance. My DS says I’ll “graduate” but not really as I won’t be receiving my certification. I asked him when that will be and he said it could take weeks to months. They started the process 8 months ago and the fact that I still don’t have it when most of my battle buddies do concerns me. I am also being sent home to wait on the clearance before I can call myself a 35F and was also told that if it never comes through, I will need to reclass and go through AIT again. Essentially, the training I’ve received here over the last few months could mean nothing. I feel discouraged and wonder why I was allowed to train without the clearance in the first place. It doesn’t make much sense. In any case, I’m just wondering what the chances are of not obtaining the clearance and other options I may have aside reclassing (I really don’t want to). My plan was to commission too eventually as well, if I’m not able to obtain a clearance now will it hinder my future plans? Any advice can help.