Husband has mandatory business trip end of sept: due oct 4th

JK
Hey everyone,
My husband just informed me that he has to go on a 3 day business trip end of sept to Madrid (3 hr flight from us) :-( 
I'm really upset because we moved to Germany (I'm American) and don't really have a support system within the same city (that I would feel comfortable laboring with haha) his parents are 2 hrs drive away thank goodness. 
How worried should I be? I keep reading it's less than 10% chance I would go into labor 2-3 weeks early. Anyone else have input or in a similar experience? What would you recommend we do? We will ask some friends here to be on call in case I do go into labor