not showing pregnancy

I didn't know that my friend was pregnant till she told me and she started showing in her 5th month. This was because she is originally thin and petite. She also had pretty bad morning sickness in her first trimester and all that vomiting probably contributed to her losing weight. She eventually had a smooth pregnancy and gave birth to a healthy baby boy! As long as you've been healthy and doctor says you're okay, it's nothing to be worried about :)