Hi,thanks for query.First of all change in diet
can not lead to missed periods.Your are doing to exercise regularly that is good.You also know that you need to lost weight, judicious mix of diet control and exercise will help you.Please plan your diet well,have 4-5 servings per day,it should include,fruits,salads,soups and natural juices.Please avoid deserts,chocolates,ice cream,cold
drinks etc,at least in initial phase.please also get your thyroid hormone
level checked.do not worry about minor things ,weight loss
is a mission.
wishing you good health.