Can I Stop the Invisalign Treatment Early, Wear the Retainer Every Night, and Get Back on the Treatment Several Months After?

I understand you are asking.  However, the person best qualified to answer this question is your orthodontist/dentist.  But see if this is helpful: the scenario you describe could possibly work, but if you were my patient, I would try to talk you into continuing to wear the aligners as designed, and when the school begins, if you are still having trouble speaking confidently, then I would address the problem this way:  during school hours when you are in a class where you need to speak, you would have the aligners out.  Other times you would have it in except to eat.  Depending on how much you have the aligners out,  you would need to wear each aligner an extra week or two.  At least this way you could continue with the treatment and not lose the ground you have gained.  I hope this is helpful.

Generally, interrupting Invisalign treatment is not advised and may result in relapse and the need for a new ClinCheck plan. Based on what you shared, you have an involved case as your refinement will extend treatment for a year. I have many college students, models, teachers and celebrities in active Invisalign treatment with few problems.  Your speech complaint should be addressed with your dentist as the trays may need to be modified to assist with your adjustment to them.

I understand what you are asking but in most cases this is going to cause more problems and delay treatment even more.  I would not recommend it but speak to your dentist about it and see what they have to say