Here you go hon, I found this on the Net.

Weeks of pregnancy HCG level for single baby (mIU/ml or IU/L)
Week 3 0 to 5
Week 4 5 to 426
Week 5 18 to 7340
Week 6 1,080 to 56,500
Weeks 7 to 8 7,650 to 229,000
Weeks 9 to 12 25,700 to 288,000
Weeks 13 to 16 13,300 to 254,000
Weeks 17 to 24 4,060 to 165,400
Weeks 25 to birth of baby 3,640 to 117,000
4 to 6 weeks after birth Less than 5

As you can see, the variations are huge so try your best not to read into your results. If you don't need to be monitored constantly then I would stop getting blood tests if I was you. They'll end up causing you more worry than joy!

HTH!