beta # not quite where does would like

Morgan
Hi all,
I *finally* got my BFP on Monday 2/20. We were beyond thrilled and have been cautiously optimistic. 
I had my first beta re-check today (2/22) & it's not quite where they'd like it. The Drs want to see a 50-60% jump every 2 days but mine was at 45% today. I know it's not too far off but I'm still trying not to freak out. 
Has anyone been in a similar situation and gone on to hear more positive results?