Who is or works for a vet/aimal hospital?

last month (novembr 4) i took my cat to the vet cuz her skin was all flakey. they doctor said she had fleas and that her mouth was infected cuz she had puss or something in her mouth. they saID to come back. im going back december 5. my moms bf is saying that vet's rip people off, and hes saying my cat isnt sick. she is sick. shes been following people around meowing. and her eyes look all watery and sad. I know the doctor wouldnt say something was wrong with her if nother was wrong.. hes saying they just want my money. wat do u think???