Whats the symptoms of food poison?

I honestly feel like I got food poisoning so I usually cook but sometimes I don't have time and I will just grab the frozen food for Walmart and when I don't have time to cook I'll just bake that it's not all the time thing so anyways it was recently bought not even a week into the freezer and I ate it today around 11 and not even half way through I started to feel a huge headache like it was pounding. so I threw it away and I laid down then the pain started getting worst I took a Tylenol didn't help hours later I look Excedrin still nothing helped I cried cause that shit was pounding and felt worst every time I stood up plus I threw up all day today esp when I would stand up or sit up I would feel it coming. It made my head hurt even more because I was throwing up so hard that my face broke out ( idk what you call it but it's like little red dots maybe popped a vain or blood vessels from throwing up so hard idk ) and now I'm finally starting to feel a little better but still have my headache it's just not as bad but I still have the pounding in my head but it's not as bad was it was. Could I have had food poisoning?