I believe she was dropped by the label before releasing any music, really sucked for her. She did release some independent music afterwards, I assume Idol didn't let her do that. She also goes by Samantha Diaz on Spotify but they used her idol name Just Sam.
She does not come across as anxious to me? The songs are very personal to what she went through, so just seems like singing it makes her emotional. The GP will love it.