UPDATE How do you keep from murdering your dog?

My dog has severe claustrophobia so she can't be in a crate. She also has jaws of steel and severe separation anxiety. I leave for what was supposed to be a 30 minute trip with my grandmother and my grandmother refuses to take me home until 5 HOURS later saying the dog will be fine and I'm too clingy. Well I'm not too fucking clingy and you do not know better grandmother! I want to murder her and my dog. She got out of the bathroom and did this shit. You don't even want to see the bedroom.

UPDATE: she was upset I was ignoring her and crying and forced her way into my lap and hugged me crying til I hugged her. I swear she is adorable. I hate that she can win back my heart and affection so easily. I swear. Idk what I'm going to do with her. Thank you so much for all the advice. I am going to try the crate acclamation and chamomile pills. You gave me real hope and I want to cry! I love you all! Thanks again!