I am on a committee that reviews appeals and have read hundreds if not over a thousand letters over the last few years.
My advice to you is to request an extension of your appeal period - you should be able to do this by:
- providing documentation from your doctor of your diagnosis and his/her recommendation that you be hospitalized
- it would be helpful if your doctor's letter confirms that you had these health issues during your past semesters and that they likely contributed to your academic difficulties
- asking that instead of being dismissed, you be permitted a medical leave of absence until your doctor confirms that you are ready to return to campus, and that you be permitted to submit an appeal letter requesting a return to campus at that point
- follow your doctor's advice!
- when you submit your appeal letter to request re-admission to complete your degree, provide documentation from your doctor confirming your treatment and improvement in health, and stating his/her expert opinion that you are well prepared to return to campus and complete your degree
Your highest priority right now needs to be to address your health issues and to take care of yourself. If you were to appeal to my committee, this is what we would ask you to do - not return to campus immediately, but take some time off to improve your health.