Well Lana that is awfully sad. But on the other hand you have a Guppy which will be pregnant now, and as a point of interest somehow they can store up the males sperm or what have you and can give birth frequently for about 6 months or more from the previous encounters.
So, you will likely have another shot at babies, over and over again!!! You will be able to research and get some practice. You will probably have so many more Guppies than you will know what to with!
There are other kinds of breeder boxes which allow the babies to end up separated from the momma. Personally I don't care for the breeder nets for housing pregnant mommas. It seems in my observations, it stresses the momma and they like to swim a bunch, and being stuck with little room makes them unhappy. I will also feed my momma fish, at least offer a few little pellets a few times because she's doing hard work!
Often a birthing tank is a good option with lots of plants just everywhere near the top area and lots near the bottom so that the babies will find a good hiding spot. It can be a bare bottom tank or with just a light amount of substrate to just cover the glass.
Good luck with the next batch!