I'm 4 months pregnant and I'm worried because I haven't began to show yet. Sometimes it's noticeable most of the times its not. This worries me because I'm fearing for the baby, I am a bit underweight though so is that playing a factor ? They always tell me he's healthy and doing fine but I'm still a bit worried because I'm not showing. On top of that my SO mother thinks I'm faking my pregnancy because I'm not showing yet despite the fact that I've proven it with all my papers and ultrasounds. Advice please