19weeks 3days

Lala • My and my husband are expecting our 4th<3 blessing in Nov.
So I'm 5months pregnant and I don't have a bump or big boobs i use to weigh 145 now I'm at 130, my first baby Boy, is this normal??? With my 3 daughters I was showing right away and I had morning sickness starting at 2 months and with this one nothing:/ why is it taking long to show?