When do you let it be enough

I am 6 weeks 3 days and I have been having issues where my heart races even when I am laying down or at rest, I can’t hold any food or drinks down and I have a pounding headache 😩 My whole body feels hot but I am freezing. When is being nauseated and all this enough to where maybe I should be seen because it could be something else. I’m not sure if my blood pressure is acting up or my sugar but I can’t hardly move without getting sick