How do you deal with tiredness?

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Hello, I am struggling with anxiety at the moment and it keeps waking me up anywhere between 1 hour to 4 hours sleep. This then creates more anxiety.

I am a week into a relapse and had been taking 25mg Sertraline and upped the dose to 50mg but seem to have increased anxiety, inward thoughts and bouts of unreality. Is this normal?

I tried 3.25mg Zopiclone one night that did not work, 7mg the previous night which worked and I slept for 10 hours and had a big appointment due today so had another 7mg Zopiclone last night but only managed 4 hours sleep.

I worry about my appointments and this kicks off anxiety, especially with lack of sleep. How do you get through the day when so tired? How long can I have such small amounts of sleep before it makes me go mad? Worried about this...