Car Leaking Oil!

I found out my car has been leaking oil these past few days... After first I thought it would've been an incorrect oil change. In the weekend I went back and redid my oil change. I added a brand new drain plug washer and put the oil back in. I found that today the oil leak isn't coming from the oil drain plug. It looks like it's coming from the transmission... Possibly the rear main seal? I hope that's not the case. I wouldn't want to remove the entire tranny to get it fixed! That would S*CK big time. Removing the transmission when doing that clutch job was a pain. I'm going to have it looked at tomorrow and hopefully it can be resolved without removing the transmission.