Is this food poisoning?

I had canned Mackerel, which was the only different food I ate but not my husband.  14 hours later, when I started my breakfast, I didn't like eating, unlike usual having great appetite.  YET I was feeling the sensation and stomach discomfort just like being very hungry.

Even though I felt a little nauseous, I was still eating a boiled egg, half avocado, and little bit of raw celery (routined food items).  

Then, I started little bit of vomiting, little by little.  

I still took my daily supplement, calcium+magnesium.  It was not digested but completely came out after a short while.

I kept vomiting very small amount for 4-5 times more.

Then, 4 hours, I had quite a bit vomit.

Is this food poisoning?  But isn't food poisoning usually happening within hours with also diarrhea?  

I don't think this is a right place you should seek advise: call your doctor or emergency.