Weight Loss 2nd Tri

Kristin
A little worried. In my 15th week and on vacation in Germany. Caught a virus and have been battling a cold from Hell for the past 6 days :-( 
Ate pretty consistently (wasn't a flu) but just stepped on a scale and it looks like I have lost about 1 lb since my last check up 2 weeks ago (almost 3!). 
Should I be worried?