What you are feeling is most likely a result of an anxiety attack. You are taking a drug that's primary pupose is blocking acid production in the stomach. Any time you alter your bodies natural fuctions your body senRAB out signals to let you know something may be wrong, just like when you poke your finger you feel pain. Anxiety is a natural reaction and the best way to cope with how your feeling is to realize what your going through, deal with it and it will pass.