For the past 15 days: I feel slightly dizzy when I move around in bed. Out of bed: My head feels heavy and sleepy, my eyelids feel heavy although they do not actually droop. Sometimes, when I put my head back such as when I m about to drink something, I get dizzy for a few seconds. Have to urinate every time I get out of bed, but don t have to urinate often once I m out of bed. Had a very slight balance problem when walking but that seems to have gone away. Two years ago in 2015 I had these same symptoms regarding dizziness, a heavy head which felt sleepy, and feelings of my eyelids drooping. I even had persistent toothaches - but had no problems with frequent urination or with my balance. At that time they were apparently caused by a slow gas leak from my stove. I replaced the stove, kept all the windows open for 11 days and the symptoms disappeared until now. In the past few days I ve had a plumber check for gas leaks: he found none around the stove. I ve kept the windows open for the past 15 days but the symptoms persist. Please advise.