Hello beckyb, there has been a lot thrown at you recently and it must be hard to deal with so much at the same time.
I am sure they'll let you start next week that really won't be a problem. What you need to consider though is whether you are allowing your thoughts to build themselves into mental monsters.
Take some time to relax and think about something in the here and now, not the future or the past, right now. Some find focussing on their breathing helps, one breath in one breath out, try to think about nothing else, if you mind wanders, as it will, gently lead it back to the focus on your breathing. If you do that for 3 or so minutes,at any time, you'll feel a whole lot better. If you do it when you are really stuck in your thoughts, it'll really have impact as you've distracted your mind from making certain thoughts into something much larger than they really should be allowed to be.
There are other ways, praying for instance or just relaxing somewhere you find comfortable and thinking about something that you've really enjoyed like your soirée a few nights ago, re-live every moment, every word of praise and enjoyment that you heard from others or how you felt throughout the time.
This type of approach is going to help you to gain more control over how you feel at any given moment and so the chances of you not being up to doing something will reduce considerably.
Whatever you choose, be good to yourself and you'll be rewarded, now is not the time for any form of chastisement.
- Nobody has ever learnt anything important from happiness and success; problems make us grow - Consult your plan, not your feelings - If you haven't set goals, how can you expect to achieve anything?