Car problems again, Toyota Camery died on me..............????

Please help I have a 93 Toyota Camery w/ almost 300 thousand miles on it. It has been running great up until today it started sputtering and loosing power then died. Once I got it pulled over when I got o crank it back up it acts like it wants to but just spits and sputters, once we got it onto the tow truck we seen a large puddle of oil that had leaked from it. Does any one have any idea what it could be? Only serious answers please I am 8 months pregnant and have two doctors apts. To get to this week so please anything will help. Thank you.