Suggest Treatment For Changes And Irregular Bowel Movements

Question : I am a 67 yr. old female and my bowel movements have changed in the last 6-8 mo. I have them 2 to 3 times at day and seem much more (unusally large amount) than the amount of food that I eat, and certainly more than ever before. I am 5 '4" and was at 175 lbs. I recently gained 5 to 7 lbs. in the last 8 mo. though my diet has not changed. Unfortunately, I am not very active as far as doing daily excercise, but I do work 12 to 16 hrs. per week, (4 hrs. per shift) and am on my feet the entire time, walking a very large store. I also take care of a 18,000 sq. ft. house with my husband. We have started eating gluten free, mostly dairy free and try to limit sugar. We eat only grass fed beef, maybe once or twice a month, cage free chicken and eggs, eat salmon 1 or 2 times per week, lots of veggies, salads and fruit every morning, drink 6 to 8 glasses of water per day, drink 1 glass of wine or cocktail a day. I know I should lose weight, but I am on Armour Tyroid for a hypo condition. It was only discovered about 6 -7 yrs. ago after I had already gained all the weight. My normal weight was 120 -125.
feel very good internally since this change in BMs, but I'm just worried that they are not normal and maybe something seriously wrong. My endoicrinologist just asked if it was ever diarrhea. It is not. I have regular gyno exams every year, full blood work twice a year. I've had no serious illinesses, never had surgery for anything other than cosmetic. Please relieve my anxiety about this. P.S. I have colonoscopies every 3 to 5 yrs. since they have found a couple of small poleps each time. I've had 3 colonoscopies so far.