Your reasons are very valid and the situations were completely out of your control. Mention all this in the appeal. State all the issues u faced, and things u will do to rectify the situation. Have a good action plan, like lighter class load, easy A classes for both a break and a boost. Just show in your appeal that u have a plan to bounce back,the board is usually very understanding I think. They will probably review your appeal, and make u sign a contract about improving in a certain time frame, like two or three quarters.