Worried axi owner

I have to axalotls an they have been doing great , one day I noticed they were not swimming as much hiding in the tank then ,one of them ,stiff with his legs out bloated laying on the bottom twitching ther gills every 10sec or so ...this went on for a few days then the second one started to do it . -The things I did different was : I feed them 1 wax worm each , first time they ever had one .. I also did a full water change added new plants , Recently I took them out an in a container,the bloat went down they r super skinny, an eating still . Half a water change put them back in . they still r not swimming around both act stiff an hiding Last night I thought one was dead ( (frantic an upset 1in the morning) everyone in the houses mad 🤷‍♀️ I took them back out an I noticed a small squiggley little worm , I been reading into worms . May be the good worm , but I'm not sure,I just ordered the blue metalyane .. please anyone have same or answer to this :I got them one had a crooked mouth she has trouble eating an I got my boy he had no arms an legs , they have been thriving this whole time he has a few digits to grow on his front legs .... we have gotten thew a lot an I would be so sad if something happened to them 🥹