Not Sure If Period Or Stomach BugπŸ˜“πŸ˜“

So my period isn't due till text week but lately this week I have been feeling really nauseous, not wanting to eat, feeling like I'm hot and I've had diarrheaπŸ˜“ I got off my birth control of a year and a half two months ago and I only just started having a period again last month. So I don't know if this is my period coming or something else. But I feel like it shouldn't be like this. I'm really freaked out and worried. Please PLEASE help!!😭😭😭