OP here. Thanks everyone for absolutely 0 zero sympathetic comments. Yes it was a legitimate reaction. The dose I was prescribed was way too high for my weight and I had just come back from a 7 hour time change so I took my pill about 22 hours apart instead of 24 which meant there was extra in my system, giving me the bad side effects like nausea and dry heaving. Not sure how I was supposed to know that was gonna happen and not go out. And to everyone telling me to go to the doctor what exactly would the doctor have done to stop me dry heaving?? For anyone who cares I went back to the doctor and they prescribed me a much lower dose (the lowest they make) and now I don’t have any side effects.