Hello there
My, no wonder you feel down. You are doing far too much. Is there anything you can put on hold temporarily? Difficult I know.
Also, have you spoken to your doctor. There maybe something you can take temporarily to help you through until you sit your oral. I bought some Kalms, when I was going through a stressful time, natural calming remedy from the Healthstore.
I think maybe you need something to help you through for a little while and in the meantime if there is anything you can put on the backburner, do it. And when your family make such awful comments, mentally put them on the backburner. Just think you can tell them what you think and deal with them after you have completed your oral examination! Come here and rant about them instead!!!

Or write a letter to them then throw it away, that way it is out of your head - I also read an article once that said a good idea is to write whatever horrible thing someone says to you on a piece of paper and then burn it! Somehow makes you feel better!
I hope you are feeling better soon
hugs