Thoughts? Experiences? Hope?

Chisa
I'm just going to run down the facts. I'd love to hear from anyone who has been in the same or similar situation. I'm starting to lose hope. Just don't want to be too disappointed after having my first miscarriage in July.
- LMP 10/21-10/23/15 Usually 2-3 days every 26-29 days
- Ovulated Nov 1st and 2nd according to Clear Blue Easy OPK
- According to my calculations I should be in my 7th week of pregnancy
- Teated BFP on Nobember 13th (faint)
- Brown spotting for last 2 weeks; very light
- Symptoms: fatigue, mood swings, tender breast, increased urinanry frequency and bloat/gas. 🙄
-hCG level on Monday 45593
-hCG level on Thursday 47393 😳
Ultrasound shows I am measuring 6w1d. No heartbeat yet. Dr. says there's hope with the hCG level being normal, just not doubling. All blood work came back normal. And there a 50/50 chance there wouldn't be a heartbeat at 6w1d. My next vaginal US is in 6 days. I'm DYING!!!!