It is probably most likely round ligament pain! It shouldn't last too long. It's totally normal! :)
I was 9 weeks yesterday and gave been getting it for about two weeks. It also happens when I cough it laugh too hard.
I am 15 and a half weeks and have been getting the same pains when I sneeze, usually only when im laying on my back though!
I've been having similar pains! I don't remember this with my previous pregnancy. I find making sure I'm not in certain positions (like tightly curled on the couch) when I cough helps, when I can avoid it.
Its because your muscles are stretching from being prego, when you sneeze this adds more pressure, which causes pain... usually this goes away as you get bigger and your body gets used to it...