Buy some puppy pads - pet store, Amazon - put several in the carrier. They will soak up any pee that happens. Take enough with you to change them out at the vet. This is not a big deal. You are working yourself up, which is understandable, but is making every thing much harder than it needs to be.
Get Meimy and Meffy to the vet. You don't know if Meffy was hurt and just hiding it. The fact that she is so aggressive is a pretty good indication that she is hurt. She could have some internal damage you can't see even if you examine her. Aggression is often a reaction to pain.
Once you get them treated, begin the re-introduction process. See my post above. It's very unlikely that they will suddenly decide every thing is fine. Right now they are total strangers to each other and hurt. Right now they blame each other for their fear and pain. Just throwing them together will not work.
Not getting them treated for their injuries will only make things worse.
Get Meimy and Meffy to the vet. You don't know if Meffy was hurt and just hiding it. The fact that she is so aggressive is a pretty good indication that she is hurt. She could have some internal damage you can't see even if you examine her. Aggression is often a reaction to pain.
Once you get them treated, begin the re-introduction process. See my post above. It's very unlikely that they will suddenly decide every thing is fine. Right now they are total strangers to each other and hurt. Right now they blame each other for their fear and pain. Just throwing them together will not work.
Not getting them treated for their injuries will only make things worse.