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Hi. My name is***** I'm sorry to hear about this situation with Angelina. I'm glad that she's made it home! Some aren't that fortunate after getting out. Do you feel she's still eating and drinking well?
When a cat is having their tongue out and drooling, the things that I'm concerned with are - dental issues, oral lesions, nausea, and oral irritants. With her having been outside, could she have been in a fight and injured something in her mouth? That is a very possible situation. The bumps that you're seeing could be small scabs from the fight. Honestly, the best thing to do is to get her to your vet so they can give her a good exam. They can shave up those areas of the bumps and see if they are wounds / bites. If they are, a course of antibiotics is most beneficial to start up to hopefully stop cellulitis and abscess formation.
I would be hopeful that this isn't going to be a life of death threatening situation. I'm hoping for the best for her!