Too early to have symptoms?

I’m only at 8 weeks and I think my body is exaggerating or I could have some illness I don’t know about. I feel so tired, specially early afternoon, has terrible headaches, I don’t have an appetite (I used to love food) so I will go up to 6-8 hrs without food and by the time I’m hungry I feel nauseous and jittery, so I will eat then feel nauseous again. I can’t cook as when I smell food I feel nauseous. I never actually vomited. Are these just in my mind? Or created by the change of weather? It’s now spring here in Canada and maybe that’s it? I just think it’s not normal as I’m only this early. Should I talk ti my doctor? Thanks in advance!