Feeling so unwell

I’m 7 weeks pregnant and, week 6 was when I started to feel the nausea etc. Wasn’t too bad at the begin although I felt like had to eat so often and didn’t even want to eat or smell anything.

7 weeks this week and feel so weak towards the afternoon, stomach hurts probably because is empty but I can’t even think of food not even cravings...

What can I do?? I’m really not feeling well and the energy is gone and I am quite energetic person normally...

Thank you