Hi all! First time posting over here!

I had my first beta Monday at 14dp5dt of 2 embryos. I was kind of shocked by the number, 2975! Had my second beta yesterday and had 10,734 at 18dp5dt. They said it didn't rise quite as much as they wanted so they scheduled me for a third beta next week, but from my calculations it seems like it doubled every 55 hours which is right in line?!
So I don't know why it was so high to start with and then if I should be concerned about second number or not?
Thanks for any insight, this all makes me feel a little nutty!
Re: Confusion about beta
TTC #1 since March 2011
1 medicated TI cycle & 4 clomid IUIs = all BFNs
DS1 born 2/14
TTC #2 since December 2014
May 2015 unassisted BFP ended in m/c at 7wks
April 2016 FET #1 = BFN
June 2016 FET #2 = c/p
August 2016 FET #3 = BFP!
DS2 born 4/17
Me: 37, DH:39
August 2016: Started Stims 8/22
September 2016: Egg Retrieval 9/4 | 13 Mature Eggs | 10 Fertilized | 3 Blastocytes | 1 PGS Normal Embaby
November 7, 2016: FET - BFP!
EDD 7/25/17
Zoey Alexis born 7/25/17 @ 12:39 PM | 7lbs 14oz | 19 inches
@polythenepam I know the feeling, it definitely doesn't feel quite real, first ultrasound will hopefully make it more real!