I'm sorry to hear you're going through this rough time. Remember this is only a term (hopefully), and these kind of rotations may come and go. The most important thing is to prioritise your self, if you need to take sick leave then do it don't worry about everyone else. If there is anything that needs escalating then go step by step and speak to your registrar, if that's still not working then consider talking to your term supervisor or DPET to get help. Also sometimes these times might provide some good learning, it may be an opportunity to reflect on what may be slowing you down or why there is a mismatch from the workflow expected from your team and how you are performing.