I Have a Dog

I know in other posts I've been talking about how much I love my dog and that I don't want him returned but now I feel conflicted. My dog's behavior is getting worse. Now every time I try to pet him, he bites me. Before it used to be play biting but now it's harder than ever before. And whenever my parents come back to the house from going out, he goes crazy. When I invite him on my bed and I try to pet him, he bites me. No matter what he bites. He has this need to chew. My dad wants to return him. I don't want to give up on him but I'm scared that he'll never change because he has a mental issue. He's supposed to see a behavioralist some time next month since we're on a waiting list. I'm hoping my parents will give the behavioralist a chance and not send him away before we see this person. But yeah I'm scared about the fate of this dog. I don't want to believe that I picked the wrong one but I saw a golden retriever today with this girl in a wheelchair. He lifted his hind legs and put them on her lap as they were taking a picture together. I see all of these sweet golden retrievers. I feel like I picked one who could be seriously crazy and I really hope he has a chance.