Rachel Stevens was “consumed” by anxiety during the early years of her pop career. The 46-year-old star shot to fame in the chart-topping group S Club in the late 90s, but Rachel has now admitted to battling insecurities during her younger years. Speaking to the Guardian newspaper, Rachel shared: “I was strong and driven and fiery and passionate, but I ended up becoming a very dulled-down version of myself because it was: ‘Keep going, put the smile on.’ I look back at interviews and think: ‘Who is that person?’” Asked about her overriding memories of that period in her life, Rachel replied: “I…