hi pankti, tummy size cannot indicate size of baby... if your stomach muscles are strong, then you might not have a large tummy... if there is any cause of worry, your gynec. will definitely let you know... so relax dear...

do check wd your doctor . eat well. have banana with milk ťhis will help to increase baby weight and also keep in mind everyonr body is different some have big  baby bump and some have small baby bump this doesn't mean that baby is not growing. ...sit alone and quite and try to fell your baby ..

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Pankti hope you are going for regular check ups. as long as your doctor isn't raising an alarm it's fine.