I’m 72 height 5’ 9’ weight 128 lbs in good health I take no medications whatsoever.I think that I eat very healthy - lots of fruit - dif. salads mostly chicken or fish - 100% whole wheat bread.I am remodeling my house and sometimes I get very dizzy, and start sweating I believe that I drink enough more than 33.8 oz of water I walk my dog 2x per day (can’t do more it’s too hot) why do I have these symptoms do I need to change my diet ..