Lactose Intolerance In Adults Is It Possible To Develop Lactose Intolerance As An Adult?

Is it possible to develop lactose intolerance as an adult? - lactose intolerance in adults

I am 25 years old and has 2 children. I am generally healthy, but lately every time you eat or drink "food" with lots of rich cream / milk like chocolate or pudding or even my coffee every day, I'm really sore, stomach, and a lot of my time spent in the bathroom, if you know what I mean.
A friend suggested that I can lactose intolerance. Is it possible that he grows up? I thought it was something (like a food allergy), which since his childhood. Thank you!