Headache, Gas, Bloating, Burping, Nausea

In the past I have used Splenda every now and then in my coffee or tea.  Just one packet.  I experienced no problems.  Yesterday I had one packet in my tea and one packet in my oatmeal.  Hours afterward, I began having a headache, serious gas, bloating, burping, and awful nausea.  I was up nearly all night.  Every time I burped, I was afraid I'd throw up.  The Splenda is the only thing different that I eat that my family didn't.  Once I did some research on the Splenda, I am convinced, that's what made me sick.  I'll never intentionally eat Splenda again, and I hope if people complain enough, someone will pull the stuff off of the shelves!