I'm very sorry to hear that, D:
they don't seem to be stocking crickets well these days here either ><
just a few tips in a pinch:
if you live somewhere with earth worms, get some some water treated however you treat the water in their enclosure, and put it into a gallon bottle with a screwed-on lid. dump 1/4 of a cup of mustard powder into it and screw the lid back on and shake it really well. get some more treated water and place it in a pan with a clean fish gravel "beach" ( boiling them works fast P: ) and take the pan and the jug outside on a warm day. find some soft soil where you'd think worms might be, ( make sure there's not lots of clay or the water won't travel, ) set the pan down and pour the mixture slowly around the soil, just a little area, slowly, and let it sink into the earth before pouring more. when it works its way down it will irritate the earthworms, it won't hurt them, but it'll annoy their skin the way onion hurts your eyes. they'll come to the surface trying to get out of it, when they get all the way out, grab them and toss them in the pan. the water will wash them off and stop the stinging ^-^ the beach gives them some dry ground, and once you get them all and finish you can take them back inside. MAKE SURE THEY ARE EARTH WORMS. if they're red, ( night crawlers ) THROW THEM BACK. google images will help
take the earth worms and CUT THEM UP into little bite size pieces. they'll still wriggle, and if left alone they re-generate into new worms like starfish, so it's okay
scoop them up with a plastic spoon, ( only one piece in the spoon at a time ) and feed one piece at a time to each frog by placing it in front of it. ( they should see the movement and jump at it just like crickets ) don't do this all the time or they'll get too many nutrients, but it's good to toss in every now and then and it's good in a pinch. NEVER GIVE THEM MEAL WORMS. they're too big and hard to digest with their hard shells, and they're pincers can hurt the frogs' insides as crazy as it sounds. I'm not sure about wax worms, but if they're all you can get try cutting them up into smaller pieces, and if the have pinchers cut their heads off. it's a little squeamish but it keeps the frog safer. you can feed them piece by piece in a spoon as well.
if a frog hasn't eaten for an overly long period of time, portion control them. they'll eat tons, but it's not good for them. ease them back in.
if you have a problem with them fighting you can keep them separated with a nice soft fishtank net so that each can eat their food in peace. mine generally take turns but they can get pretty vicious ><

hopefully the vet can help,
but don't be yourself up too much, you were doing all you knew how to and it wasn't your fault <3
I recently took the plants out of mine's winter enclosure to make it easier for him to catch the crickets, and I forgot to put it back in and stressed him out and accidentally nearly killed him. accidents can happen even with good intentions D:
on the up side if the smaller male made it, maybe the female will as well. make sure she's not being bullied and stuff like that, and try not to handle her if not needed, maybe she'll work through it, and you have done a ton to try and help her. best wishes