I'm 20 weeks and I'm just now starting 2 show and this is my 4th
Yess I agree with clysta :) i'm pregnant right now i'm 35 weeks and this is my first baby I honeatly didnt start showing until I was 6 months :) In the begininng I was like you I didn't feel pregnant it didn't seem lile I had a baby in there. But trust me your baby from one day to another will start to show :) meanwhile yeah buy a doppler to listen to the heart and that will remind you the baby is there.
I toyally agree woth clysta, I started showing around 16 weeks (4months) and you just have to keep in mind that everyone is different
You don't have to see a belly to know the baby is there, and even seeing a belly doesn't mean everything is alright. (Hard to think about, but true) If you're concerned, you could also look into getting a home doppler. This will let you hear the baby's heartbeat whenever you want and will give you more reassurance than signs and symptoms will. Different websites sell them, and you can also get them off of ebay for cheap as well.