Turns out that the bleeding was due to a polyp on the outside of my cervix. The RE said it had probably gotten irritated and that was the cause of the bleeding. He removed the polyp and told me to "take it easy" the rest of the day. Did a quick u/s and all the babies are fine - even had some growth since Friday.
Thanks for all of your support - bright red bleeding in the middle of the night sure is scary! Off to nap now...
Re: XP: bleeding update