Morning sickness? Or food poisoning?

So my boyfriend and I have good reason to think I may be pregnant. My period is supposed to start the 2nd of June according to this app. Well we had unprotected sex the week I was fertile and the week I ovulated also on the day I ovulated. Which was the 19 supposedly. I know a lot of women say they know right away when their pregnant and others don't know until a missed period. But anyways I woke up this morning at 2:30am throwing up and also had diarrhea. I looked it up and it said diarrhea can also be a symptom. I don't know if it's just wishful thinking or if I'm actually pregnant or the food I ate just didn't agree with me.. Input would be appreciated!