Not feeling pregnant

Tabitha
I'm 17weeks 1 day today. I had bariatrc surgery (the sleeve) January 2016. I'm not showing my boobs aren't getting bigger and over all I just don't feel pregnant. My youngest is 3 and a half so it's been awhile. I can feel baby boy move daily so I know he's ok. I just thought with this being baby boy #4 I would feel and look more pregnant at this point.