For About A Year Now I Have Been Needing To

For about a year now I have been needing to urinate very often, especially at night. Sometimes only 1/2 an hour apart. Also I am not urinating a small amount, each time it seems like a full bladder. I am now dieting to lose some weight and drinking more water, of course the symptoms are now worse. There are times I will need to go 6 or 7 times during the night even though I am trying not to drink anything a few hours before bed.