Did your belly get.. smaller?

Hi ladies, the question is as it is in the title. I am a FTM, currently 14w+5d and had a small but sizeable belly poking out. I recently started to get over my first trimester constipation and perhaps coincidentally to that, I have the impression that the appearance of my belly is smaller now. Just last week I had an US and things seemed fine. It's just that my belly is not as pronounced anymore. You think this is normal? Has any of you had this before?