I've had a headache, diareah, stomach pains, and nausea for almost 3 days, I was unable to sleep either so now I'm tired. I also have acid reflux?

Have you been seen? Your symptoms could be a primary GI disturbance such as IBS or something simple gastritis or something more complicated like colitis. Or you could have a primary problem of some type of headache disturbance with GI involvement secondarily. It's going to hinge on your history and evolution of your problem and response to any treatments that have been given. You need to see a doctor for a workup.