Sleep problems with anxiety

I am currently waiting for my increase in Citalopram to take effect, and have suffered really bad insomnia for the past 3 weeks. I have managed to take Zopiclone most of the time, but obviously it’s not ideal. My first increase 9 weeks ago to 30mg, although giving me some relief has not sorted the anxiety, so I’m stuck in a cycle of not sleeping when I don’t take the Zopiclone and making myself feel so much worse the next day, if I go cold turkey and try to sleep without it, as I’m so anxious. I have recently tried Melatonin, but had a sleepless night, what has everyone else been prescribed to help through this initial period?