I had that too n I was told it was the uterus stretching.
Yes it is round ligament pain. Its just your belly strengthening itself to support your baby when he/she gets big. :)
I've had the same pains, and sometimes its very uncomfortable! I usually just rub the spot that hurts and it seems to help.
I am 20 weeks today and have had pains for a few weeks.
I went to the hospital for it they sat it's round ligament pain.it will go away in a few days.im 18 weeks the happened to me at 17 weeks.
I'm 18 weeks tomorrow and since I was half way threw my 16th weeks I've have sharp pains.. im sure it's just growing pains making room.. I can usually tell by the way the pain feels. But unless it's horrible im sure everything's fine.:)