I need someone to put my mind at ease...

I am approximately 4w6d pregnant (with a history of miscarriage at around 6-7 weeks back in September '12). Yesterday, at work, I went to the bathroom and noticed some brown tinged cm in my underwear. I called my midwife's office and they wouldn't do anything to help me relax so I went down to the er to be checked out. The nurse practitioner that saw me did a pelvic exam, ultrasound and ran some labs. My pelvic showed a closed cervix and no active bleeding. The ultrasound showed the start of a gestational sac and possible a little yolk sac and my betas were 1122. I go for a redraw on Thursday (which luckily the NP wrote for me to get them done at work since my midwife won't order them for me). I'm also bothered by the fact that my boob tenderness is pretty much gone.

Can anyone help calm my nerves? Does this sound normal? Anybody have comparable betas?