I Am A 66 Y/o Female, Recently Retired As An

I am a 66 y/o female, recently retired as an RN. Although my diet is healthier now than when I was working, I find that my bowel movements have changed a lot, not for the good. They are mostly regular in frequency but not in consistency - normal, hard, soft, even diarhhea at times, and I am experiencing increased gas. I thought a colon cleanse might be beneficial because of my "irregularity" since I feel I do not truly empty my bowels at any given time.