I need advice..

This is my 3rd pregnancy, is it normal to not feel pregnant at all? Im 16 weeks and 2 days like I'm not having any symptoms on a daily basis like other girls are. I had really bad reflux yesterday but nothing today. I've been super moody and just don't want to be touched by my partner or have sex. In my pregnancy with my 2 boys I had a really high sex drive and wasn't this moody? Can find out the gender in 3-4 weeks.