well that doesn't really help. the 1.080 was after the yeast had eaten some of the sugar lowered the SG. without an OG reading there is no real way to measure the amount of alcohol thats in your brew. best we can do is take your recipe, correct it for the actual amount of water that you used, and hope your measurements are accurate. did you remember to temperature correct your hydrometer readings?
on the bright side you most definitely have an active fermentation going on. next time get a dowl from your local Home Depot and a gallon of water from the grocery store. pour the water into your brew pot. stick the dowl in along the very side of the pot and mark where the water line is. refill the gallon jug and pour it into your pot. reinsert the dowl and mark the water line. keep this up until your pot can't hold anymore. now you have an accurate volume measuring device calibrated to your pot. makes getting the proper volumes of water ALOT easier. i recommend cutting or burning the marks into the stick. just be sure you don't set the world on fire.
so whats your recipe?