When someone has a psychotic break, it can really distort their perception of time. My ex-gf said that what was 3 months for me and the rest of the world felt like a few days to her. As for allowing phones, I think it varies by the case and facility.
The likelihood of it being a ploy depends on your full knowledge of her personality and character. You may need to move on with your life anyway though.
"Many people need desperately to receive this message: 'I feel and think much as you do, care about many of the things you care about, although most people do not care about them. You are not alone.'" ― Kurt Vonnegut
She was in a psychiatric ward for months. She's probably going to need some time to herself and her thoughts. Not everyone wants to start talking/messaging everyone as soon as they get their phone back (obviously). I don't know but going by your post, I wouldn't take it personally. Posted via Mobile Device