Gosh sorry to hear you're sick so early. In my experience if you're sick this early you're not in for a good time. I've had hyperemesis on this pregnancy for 6 months. The first time I vomited was when I was 4 and a half weeks pregnant - a few days after my missed period. It went away for a few weeks then came back with a bang and I had to be put on medication. Have a look at a website called hyperemesis.org. It has loads of invaluable information.
I don't want to scare you. Maybe your sickness isn't pregnancy related and you just have a bug or something
Me 34 DF 41 TTC #1 since July 2011