I think you need to get in touch with your Personal Tutor ASAP to talk this through. It's probably too late for the upcoming assessments so, and as there is a real risk of you not completing these assessments on time, you may want to consider submitting a PMC/EC application to cover late or non submissions. You will need evidence to support your application which you may not currently have, but you can still submit an application and say that evidence will be forthcoming. In the meantime, get in touch wuth Student Support which should be active over the Christmas vacation and see what support is available. You might also see your GP. If you can keep everything going, there shouldn't be an impact on your loan but can't advise beyond that sorry.