11 weeks is really early to feel contractions so I would suspect it may have been something else, but it is possible .I started feeling mine around 13 weeks, you're body does just naturally have contractions. I was told that as long as you don't have more then 4 in an hour there is nothing to worry about, but that you should call three doctor if your having more them that
are you sure its contractions and not round ligament pain??