I went a little nuts during my .G.C.S.Es too and I didn't have a pregnancy to worry about! I was a nervous wreck and felt sick all the time, god it was a horrible time! You'll get through it though, danni, just like I did.
As for the pregnancy news, it's hard when you feel you can't talk to people about it and when it's making you feel ill too, it's double crap. Everyone at my work place wondered what the hell was going on with me because I changed into this sullen, quiet and withdrawn person who kept 'popping to the loo' every ten minutes (to retch). By the time I told everyone - at 15 weeks - all the morning sickness had passed and I felt normal again. It's hard!
You've got us lot to talk to though!