Belly gone soft @ 28 weeks

[kirstenn123]

My belly is normally rock solid except for the bottom , which is always squishy

I've just been relaxing in the couch , felt my stomach & noticed it's gone soft
I've tried feeling around to feel the baby & I can't seem to find him
He's kicked once in the last 15 mins or so

Aside from that , I also feel a little unwell
I've got heartburn ( antacids are doing nothing ) & feel like I've vomit stuck in my throat
I did vomit earlier on when I had a nap also
I've also very slight pain in my ribs underneath my boobs - almost like a stitch as if I've been running

Is this normal @ 28 weeks ?

Baby's probably just turned back to back so you can't feel his back/bum. Mine likes to flip around a lot and sometimes my belly is really hard and firm and sometimes I wonder where the hell the baby's gone