31 and starting to see change in my period

I am 31 and have always been regular. (Every 25-27 days and lasting about 3-4 days) and recently about the last 3 months I have noticed that my periods are getting lighter. I have never been on Birth control nor am I sexually active. i am usually heaviest on day 2 and some on 3 but now I am only heavy on day 2 and by day 3 it’s like spotting. Has anyone experienced this?