For the past few weeks, I have been waking up twice a night and feel jittery. Once my heart was racing, the other times have been just a normal heart rate even though it feels as if I have been up for a while. I have pain in my chest that moves around. My doctor, after normal test results, has suggested acid reflux. However, the medications for cause me problems. Also, the pain in my chest is often in the upper and not middle of my chest. Last visit, I had a blood pressure that was 144/87. This slightly in the hypertension range and is the first time I have been above 120/60. I also am having lots of gas issues. I have cut out coffee and alcohol and am drinking warm lemon water in the AM and taking a probiotic pill. Any suggestions as to why I am waking up in the middle of the night and feeling jittery every morning? Also, I am 42. Any possibility this could be pre-menopause?