first trimester

I am 7 weeks pregnant and feel terrible, is anybody else it the same boat? If im not being sick I'm hungry, if I'm not at work I'm sleeping, if my chest isn't hurting it's my headaches! I mean I don't mean to complaine I'm so happy and grateful I'm pregnant! But man it really is hard work? Does any body else feel like this? I suppose it's a sign off everything progressing the way it should be.