Talk to Gynecologist on Pregnancy

Assalam o alikum First pregnancy.. Week 6 day 4 I am experiencing vomiting and nausea since a week now and cannot eat anything except some fruits. I was told first three months are of organ development and it's okay if I cannot eat or drink too much. I'm underweight but very active and healthy otherwise. But now I'm tired all day and can't do anything due to dizziness. Havn't been to doctor yet due to some issues. Is it okay if I eat less? Pls guide me as I'm overly stressed and people keep saying if you won't eat, you'll regret. Pls tell me if I need to put in more efforts in eating or can I wait for this nausea and vomiting to settle before restarting roti and chawal which I cannot even smell. Have some physical disability issues in family as well.