7 weeks pregnant and bleeding

Hi,

I had a scare this past Friday. I had gone on Thursday for my very first U/S. Everything was great. I saw the heartbeat and fetal pole, and the fetus was high in my uterus. I was no longer nervous. Then early friday morning I woke up with some brown discharge. I was bleeding both red and brown blood each and every time I went to the bathroom. I rushed in to the doctors for another U/S that same day. They told me that everything looked fine. Baby's heart was still beating. I was put on bedrest this weekend but it is pretty much the same. Both brown and red blood when I go to the restroom. Can this be ok for the baby? I hope this is not a sign for miscarriage. I dont have any cramps which i assume to be a good thing. They checked my cervix and it was closed and fine. they checked for cysts or growths and none were seen. What should i do? This waiting game is making me nuts.