OKAY!!!!!!!! Chill dude!!! Take deep breaths, This isn't as big of a deal as your making it out! Mollies breed like ALL THE TIME. And if shes been pregnant once then you can bet she will drop again (without even mating again!!) so long as you keep your water conditions good. Don't worry about the fry until you can, so when you have a bigger tank, then by all means try and save a few! But even when you upgrade to your ten gallon it wouldn't really be big enough for three adult mollies, so what were you planning on doing with their fry? Selling them?
ANYWAYS my point is, theres nothing you can do, so sometimes its better to just not notice. It makes it easier on yourself, trust me. Stop worrying.