Beta numbers

July 1st I went for my 1st beta which was 188. The second beta was July 5th at 625. My third beta today July 7th was at 876. This third test seems to have slowed down a bit. Missed the nurses call but she left me a voicemail with the number and told me to come back Monday that they want to see my beta at 2,000. That seems awfully high from now till Monday especially only getting an 876 today. Maybe I'm just freaking out but any ladies with similar slow downs? Just wondering if this is normal or if I should be concerned. Sad I didn't get to talk to the nurse to ask :/