Did my stomach or intestines shrink?

I get full a lot faster now than I did before after eating high fibre veggies and smoothies. Today I was full after eating less than 6 tablespoons of cabbage soup. I had this happen multiple times where my ability to eat decreases after a period of dieting, leading me to think that either my intestines shrank or my stomach shrank.
Did my stomach or intestines shrink?
Post Opinion