Disrupted sleep on quetiapine

I’m on quetiapine for sleep (and additional antipsychotic when I was hypomanic) and my doctor wants me sleeping more than 7 1/2 hours sleep. Unfortunately my sleep is still disrupted. Offen but not every night I will struggle to stay asleep. I will wake up every 1/2 hours to 1 1/2 hours resulting in me waking up around 6 times a night. I get up at least half these times, get a drink, go to toilet etc. then I spend time trying to get back to sleep. Other times I can just turn over and go back to sleep. Either way my sleep is disrupted and I wonder if others are experiencing this. I had the same prior to quetiapine but isn’t the sleep drug supposed to help. Thanks in advance