Hello
Your age is 57 years and blood pressure was 141/100 mm of Hg at the time of
dizziness , so the cause of dizziness is clear .
You are a drinker , over weight .
You should be worried but not too much. Your blood pressure is high but not too much.
You may easily get back to normal range .
Take following measures .
1 High fiber diet , green leafy vegetables , fruits .
2 Cut down the processed food , white bread, dough nuts , white sugar, pizza should be completely avoided.
3 As you mentioned that you exercise thrice in a week , this is good for you but try to avoid elevate the level of exercise ( 5 times in a week ).
Also avoid alcohol , if not possible then 30 - 60 ml / day not more than this.
Till now this is not a cause of concern ,but if dizziness recurs , then consult a physician and get his opinion.
Good luck.