Hello Mr boyfriend, this is the problem with unprotected intercourse
, without wedlock. Anyways, though you didnt penetrate fully, but still you have chances of making her pregnant. Anyways your girlfriend has taken the emergency pill within prescribed time, and her chances of getting pregnant is 1.1 %. The blood which came out could be probably the Hymenal tear. And the side effect of these medicines are mostly GIT symptoms, sometimes if taken repeatedly it can affect her menstrual function and even can compromise her future fertility
My dear I suggest you GET MARRIED SOON, all the best.