As someone who has served on a faculty committee that reviews such appeals, I have a few comments. First, you should consider not appealing the suspension. Maybe you need a semester back home to figure out what went wrong, where the weaknesses are. This is not necessarily a bad thing. It can be a time to reflect on what you want out of your college experience and how you will achieve it.
But if you do pursue an appeal, you should keep in mind that a retroactive medical withdrawal will mean that every course for that entire semester will be a W (withdrawal) and you will not receive credit for any of your courses. Furthermore, many colleges require you to take a semester medical leave following a medical withdrawal (so you would actually not be able to request a return to campus until the FOLLOWING semester). In this scenario, the entire year is a loss in terms of credits. This may be the best plan, but it may not be.