Rachel Leviss was “deeply saddened” to learn about Jax Taylor’s mental health struggles. The 45-year-old star recently entered a mental health facility and Rachel has now taken to social media to express her support for Jax, who has Cruz, three, with his estranged wife Brittany Cartwright. In a message posted on her Instagram, Rachel said: “I am deeply saddened to hear of Jax’s mental health struggles and I wholeheartedly support his decision to seek treatment.” Rachel, 29, actually spent time at a mental health facility last year, following her months-long affair with Tom Sandoval. And the re…