Did the doc tell you to stay off your feet and stay hydrated? Walking around will make the uterus contract. Some bleeding just happens, and sometimes it is a bad sign, but one thing you can do just so you can tell yourself you did everything possible is go on bed rest until it stops. Only get up to eat and to go to the loo, if possible. Again, keep hydrated, the uterus can get contractions if you are dehydrated, and also don't be walking around a lot. Good luck, I hope it's nothing.