Are my HCG # this last week normal?

On 6/15 (17 hcg) The day we found out!!
6/17 (55 hcg)
6/22 (1056 hcg)
Took Clearblue advanced on Friday 6/24 and it said 3+. I've read that result is for 2000+ hcg, not sure on that data. Just want to know if this is doubling how it should be. I'm 6 wks 1 day. Thanks for any responses.