I feel your panic. I spotted/bled with all 3 of my pregnancies, and it got no easier anytime. With my first I just had pink spotting on and off in the first trimester. With my second I had a lot of bleeding. I had quite a bit just after I found out, about 5 weeks, and then I had horrible bleeding at 7 weeks if I remember correctly. I thought for sure I was miscarrying, as I saw a kind of mass at one point. The bleeding stopped and my doc sent me for an ultrasound and I had a happy heathy baby in there with no sign of what caused the bleeding. I to this day truely believe that he was a twin and I lost the other one. My third pregnancy I bled quite a bit as well. I had something called a subchorionic hemotoma, which is a blood pocket between the placenta and the unterine wall, most likely formed during implanatation. I was put on moderate bedrest and pelvic rest, drank lots of water (water will help relax the uterus from contracting) and took vitamins. This all happened around week 7, although I had some light spotting around 5 weeks too. By 12 weeks the bleed had passed and everything was fine.
Bleeding during pregnancy is a scary thing, unfortunately I am one of the lucky minority that has this happen. I did have 3 healthy babies, never lost a single one through all my panic, thank god. It's good that your doctor is monitoring you closely, its hard because to them there is nothing they can really do to prevent a loss so they don't look into much for you, that's the attitude I feel they take anyway. Hang in there, rest up and try not to do lifting and other exherting activities. Drink lots of water, take your vitamins, and no sex whenever you are spotting. Good luck to you, I wish you a very healthy baby :)