Toy chihuahua was lost and now rehomed (51st camelback)

I went to hospital. My adult son was supposed to hold both my dogs He lost Mercedes please we know robin Joplin wanted to get her fixed and chip and give back to me. But once she learned I don't have my own apt I'm sleeping on couch at my cousin's she felt it was best to give my dog away. Pls help me get her back. She's all I left. I'm no longer homeless and I'm working a job but I need to get my 4lb baby girl home please I beg you. I was in the hospital and my adult son lost her Please she means everything to me I will repay any costs you spent to fix her back Please