Brittany Cartwright doesn’t think Jax Taylor changed “at all” during his spell in rehab. The 45-year-old reality star spent time at a mental health facility earlier this year, but Brittany doesn’t feel it’s had any impact on him and she doubts whether he even has the capacity to change. Brittany, 35 – who has Cruz, three, with her estranged husband – said on the ‘Hot Mic’ podcast: “I don’t feel like he changed at all in those 30 days. And the reason, I mean, I’m sure it’ll be on the show as well, but, you know, a lot of rage texting and stuff was still going on the entire time that he was in r…