A few questions from a nervous 1st timer!

I am six weeks today, it feels like an ETERNITY till the first trimester is over and I can finally TELL PEOPLE! I am not good with secrets :-)

Anyway, I know the basics about what you can and can't eat, but what about custard in a tetrapak from the supermarket? And can I use cream in my cooking? I assume so but want to be EXTRA careful :-)

Also does anyone know the story with going to the dentist. I am due a filling replacement this afternoon and not sure whether I should have a local anethestic!!