How to get rid of a gy stomach FAST.?

I have plans today, and my stomach feels weird and gy. Like, I don't want to eat anything because I feel like I'll throw up. And last night, my tummy was making noises. I've had it since about 1:00 this morning, so I drank ginger ale and took Advil before I went to bed. It worked for a little while, but I woke up at 5:00 with an upset stomach again. My mom and brother had a more extreme version of this yesterday, and they were stuck in bed all day. I really don't want to cancel my plans, are there any ways I can get rid of this fast?