Vicious circle

My wife managed to take my pressure in the night 144/85... perhaps the diatolic (second number) pressure is a little lower than during the day. I took my pressure firsting in the morning before getting up: 149/95. This is really quite depressing and now I feel myself entering a vicious circle of worrying about a kidney problem caused by worrying... it's going to take a big change in mental attitude to break out of this one.