At what point should I go to the doctor.

I have no appetite. I haven't thrown up since learning I'm pregnant, but today and yesterday I've been gagging over the sink and wishing I would throw up.

In the last 5 days I've eaten maybe 1000 calories. I'm drinking fluids when I can, but I have no desire to eat at all. I know everyone says it's normal and I'm not harming my baby, but I still need to eat for me!