What’s going on with me?

For the past 2-3 days I’ve been feeling sick almost a constant headache, different poop, a tad light headed, and sick like I’m going to throw up but I can’t/won’t -it’s only the excessive amount of saliva you get when you’re about to puke-, I’ve been eating normally but still seem to be hungry after eating like it wSnt enough.

I just went to the doctors yesterday and everything was fine w me so does anyone know what this could be??