emily...
if you're having trouble keeping things straight and knowing where to go next, just 'plot' it out...
write up a brief synopsis of what you think the story/plot is going to be [or what it is so far]... then, convert that to bullet point thumbnails of each story element... from that, you should be able to see where you've painted yourself into corners and which characters are at a dead end and need to be either rescued or dropped...
just remember what the word 'plot' means... it's not just a noun, but a very useful verb... in nautical terms, it's what a captain does to lay out the ship's route from point A to point B... your point A is the beginning of your novel, point B is the end...
get the point?
hope that helps a bit... love and hugs, maia