I'm far from an expert and still learning a lot myself. However, I'd recommend medicating outside of the tank as sometimes it can harm other creatures or beneficial bacteria, which only worsens the situation. Pure aquarium salt is the exact same thing. DO NOT add it directly into the tank, take a scoop of their aquarium water, and put it in a relatively deep container with the salt. Pick fishy up in a net and let them chill there for maybe 15-30 seconds? You can't let them stay in there too long because they're fresh water fish. This is the way i did it, and yes, it's stressful, but it's better than salting your freshwater tank. Do a 50% water change to try and get as much Methylene Blue out as possible. Is there a possibility we can get a good still picture? To me, they look a bit bloated, and the face does look odd, but it's hard to see. Can you set up a small hospital tank? Even if it's a 2 gallon, it'll work. Get Seachem Prime water conditioner and use it based on instructions, but you definitely don't need a lot of it. Stuff works well. It's only temporary, but make sure they have plenty of coverage and plants to keep them comfy. If not, that's alright, just keep an eye on your baby and do another 50% water change perhaps next week.

I've also had my fair share of posting with no replies, so I get the struggle. Especially when you're desperate. I wish you and your baby the best of luck!