Arrrghh! Only 2500 Words and Writer's Block?

Gosh, I'm barely through introducing my main characters and am trying to set up the background on which the story plays out, while building personlaity into the non-narrative characters...and BAM! I can't think of a word to say or rather type. I can go into rather boring detail on the world I am building, but that would actually detract from the story. I need to build indentifiability with one of the main characters - a females character - and I am just drawing a blank. I am going to try jumping ahead in the story and write later chapters - see if that works. Will keep you informed.