Morning sickness!?

I was at a restaurant with my husband last night for dinner feeling completely normal when all of a sudden I felt hot and dizzy and had to run to the bathroom to vomit. All I had eaten so far was a salad and drank some tea. Since then, my stomach has felt nauseous and I’m wondering if I am possibly pregnant. Anyone who has experienced morning sickness, does this sound like that or could I just be sick? This is my only symptom besides tiredness.