Or do you think my body just didnt like it?

I ate left over Turkish pizza when i got home from work yesterday, after about any hour i started to get this rotten headache. A friend of mine wanted to go grocery shopping so i tagged along, i started to get horrible pains in my belly, my headache was worse but i didnt say anything to her.

I got home, DP had tried to call me so i called him back and we were chatting. I had the urge to cough so i did and i dry heaved, i knew i was going to be sick so i told him id call him back.

I barely made it to the toilet and it came out, like projectile vomitting and i vomitted for 20 mins straight. I then continued to do so for the next couple of hours until at about 8pm i couldnt take it anymore, my head was throbbing so i rang DP (who was still at work) and said i was going to bed.

I felt fine when i first woke up now my head is throbbing again.

Any ideas?