Sonya - congrats on your pregnancy. It is common to get pains during pregnancy, and could be nothig. I would definitly keep an eye on it, check for any bleeding. If the pain pursists or gets worse or you get pains in your shoulder. I'd call a midwife of visit a&e.
Some pains can be caused by an ectopic pregnancy, which could be seriously harmful to you.
Although its best to stay positive i know if i were in your position i'd be worrying.
So keep and eye on it, and don't consider ignoring anything that you suspect could be more serious, its not worth risking your health or the baby's.
Hope i haven't scared you, just being honest and matter o'fact. I think hearing all the nice fluffy things some people say can only make you ignore more serious issues.