you have al the signs of dehydration and hypovolemia from poor fluid intake which causes your blood pressure to go down especially when you first stand up. since you are keeping food down now then i would try to find foods with the highest protein content like eggs peanut butter beans also fruit such as blueberries strawberries bananas(which have a high potassium content that you loose with vomiting/diarrhea). i'd suggest you make some fruit smoothies and throw in some spinach to help your fluid intake too. if water gets boring for you try pedialyte in the baby section of the grocery store. it has the elcetrolytes that you loose with vomiting/diarrhea. you may also try ensure or boost which also has vitamins minerals and electrolytes. good luck in your recovery.
after vomitting and horrible diarrhea i am still nauseas dizzy and very weak 2 days later why? how can i fix this? . i had food poisoning after a day i thought i was done. the next day i felt extremely faint dizzy weak couldn't barley stand and quite nauseas again. and i woke up this morning all the same symptoms. but at least i am keeping food down. so why am i feeling like this still? how can i counteract the weakness and dizziness? i have so much to get done i need a band-aid for at least a few hours of normalcy to get stuff done.