Disappearing bump anyone?

I’ll be 16 weeks tomorrow and have been noticing a steadily growing “bump” since about week 10. I know it was initially mostly bloat, but thought I was getting to the point where it was finally becoming more baby. Well, I woke up today with an almost flat tummy! It usually gets bigger throughout the day, but it’s still barely noticeable after 2 meals. The left pic was few days ago when I caved and bought maternity clothes because my regular stuff was getting too tight. The right is today. Both pictures taken around the same time of day. Has this happened to anyone else? I was just getting used to looking down and seeing my little guy pop out, hoping he comes back and sticks around for good soon 😊