There is a wide range. The important thing is that it doubles every 48 hours. In my case, it did not turn out well. At 14 dpo I had a 28, then at 17 dpo I had a 79, at 24 dpo I had 1219. They did not rise like the Dr wanted and I had to have a D&C at 9 weeks but the Dr said it quit growing at 7. Having said that does not mean it will happen to you. Try not to let it drive you crazy although I know it will because I have been in your shoes. I've had 4 pregnancies and lost 2 of them. Here is a chart that should help.
7 days 3 weeks 0 to 5
14 days 28 days 3 to 426
21 days 35 days 18 to 7,340
28 days 42 days 1080 to 56,500
35 - 42 days 49 - 56 days 7,650 to 229,000
43 - 64 days 57 - 78 days 25,700 to 288,000
57 - 78 days 79 - 100 days 13,300 to 253,000
17 - 24 weeks 2nd trimester 4060 to 65,400
25 wks to term 3rd trimester 3640 to 117,000
After several days postpartum nonpregnant levels (<5)"
Good luck. I hope for nothing but the best for you. Keep us updated.