I hear ya Ren! I am 31 weeks now and I am as big as I was with Bella at 40 weeks! And bub feels so much bigger and moves so much more!
I think its eally due to the fact that our bodies know what they are doing this time around - I was big early on and I think it was because my tummy muscles said "Oh yeah I know what we are doing here" and just let it happen - Not like the stretching that our muscles go through for the first time.