I am so sorry that you are going through this with your cat. It could be that she has feline herpes, which is by no means a death sentence but something that she will have for the rest of her life. All of my cats have it, and in times of sickness or stress, it rears it’s ugly head and your cat gets symptoms: runny eyes, nose, sneezing, etc. just like with a cold. L-lysine has helped my cats by adding it to their food–they don’t notice it in their wet food and it helps alleviate their symptoms. I see you have it in your list of medicines, along with probiotics for the immune system health. These are things that I would recommend personally.
Also, remember we are not vets here, but give advice on our own experience with our own pets. I don’t know why your kitten is limping, but she may have jumped and landed wrong and just needs time to heal. The lump that is oozing is concerning also, but Vetricin is a good topical spray for an abcess, given that that’s what it is. If you can get it in Japan. I cured an abcess on my outside cat by draining the abcess, cleaning the wound with Hibicleanse, then spraying with Vetricin. In a day, it was healed and better.
Your cat has been through lots of vet visits and medicines and her system is probably on overdrive, trying to fight off any infections PLUS the added stress of vaccinations. Vaccinations take a toll on a kitten in the first few days after, so please realize that. It’s also good that you got her dewormed, since you actually saw a worm. You can put Vaseline or a baby diaper rash treatment like Desitin on her anus to help heal between bowel movements. If she still has diarrhea and you are worried about her becoming dehydrated, make sure you get fluids into her any way you can, even if it’s with a syringe. If the vet didn’t take a fecal sample and she has bad diarrhea, she could have a one celled parasite that the regular dewormer won’t kill. It could be coccidia and they would have to prescribe another drug. You could call them and ask if they checked for and treated her for this. Good luck and keep us posted!