try and hang in there. i know it must be frustrating to not be able to just go into the dr. office for an u/s. If they were open, they'd probably let you come in just for peace of mind.
It's so hard, especially after experiencing a m/c- there's almost nothing anyone can say to make you feel like things are okay. I've had 2 and with this pregnancy, i had some bleeding at about 5-6 weeks off and on. it was pink and then bright red. everything I read sounded like the bright red was a big concern and brown wasn't anything to be concerned about. If it helps, take comfort in the fact that SO many of us, especially in the Aug. Mommies thread, have had some bleeding- brown, rust, pink and/or red. It just shows you how common spotting really is. i said this before, i wish when you go in for your first appointment, that they would give you some kind of literature about spotting, since it's so common- you know, something that says what is cause for concern, what you should do, etc. i hate using the internet as a resource for this pregnancy stuff because you find such varied answers.
Just wanted to say take care and my thoughts are with you. i know it's hard, but try to just take it easy and think positive thoughts.