Vomiting???

Hi!

My period is a day late and a few days ago I ate 2 mini pickles as a snack and I was fine. The expiration date says year 2020 and to refrigerate which they were. Last night, I ate one of the same ones and like an hour later I felt very nauseous and had the worst cramps. I ended up vomiting everything and having diarrhea. Does this have anything to do with possibly being pregnant or???

I am asking because I’m tired of taking pregnancy tests over a missed period because they are always negative. I am looking for other signs/symptoms associated with pregnancy instead of a missed period before I take another one.