Hi I have been offbalance and sometimes it feels like there is a lump in my throat, I can feel something in my throat, and discomfort in the center of my back, and yesterday and today, numbness in my head, I was dissy and numb 2 weeks ago and I went to the hospital, they checked my blood pressure laying down,sitting up and standing up, and gave me a cat scan they didn't see any abnormalities, it went away an came back 2 days ago. What could this be? Possibly anxiety, inner ear infection, or heart problems, I had a angiograph a year ago from cocaine use, they said I would be fine with exercise which I have been doing, the front of my heart was pumping week, I told the doctors this and they couldn't find anything, also about 8 months ago I was had an off balanced feeling and the doctor said I had an inner ear infection. Please help thank you.