What can I do if I don't want to continue my Invisalign treatment?

It's unfortunate that you are having issues with your aligners.  I can certainly understand how it might not be right for you.  Has your therapist tried helping you through this struggle?  A short, but incomplete, answer to your question is to just quit wearing them.  The reason I say incomplete, is that you might have attachments bonded to your teeth that need to be taken off by the doctor.  Leaving them long term can cause issues.  Also if you are in the middle of treatment there may be spaces or other issues, that if left unresolved may cause problems.  But in all likelihood, this early in treatment, your teeth will probably just drift back to where they started. If you'd like an opinion from an orthodontic specialist in your area who I know will be compassionate and understanding give the Reading Orthodontic Group a buzz.  Dr. Mauro and Parisi will take great care of you!   Good luck.