6 weeks pregnant and very concerned....?

This is my fourth baby(6th pregnancy... m/c 2 last yr), but this time I feel horrible. I have a huge decrease in appetite, but I dont have nausea and I feel like someone just kicked the crap out of me. Also I look horrible. Usually I have makeup on and fix my hair, but now I am in PJs with my hair up n no makeup. Dont get me wrong I have felt bad before when I was pregnant but not this soon. I never felt bad til my 9th month. It is normal to feel this way so soon? When will it go away? And is it normal to have no appetite at all?? Thanks in advance.