My DD was the worst sleeper for months. Some nights it would be 40mins sleep, awake for 20, asleep for an hour, awake for another 20mins all night. And then hardly sleeping through the day!
But after the age of 1 it started to naturally improve so that she was only waking once or twice a night, which is manageable in comparison. And now at 21 months she sleeps through most nights and when she does wake it's not for very long. A sip of water or two usually does it.
I remember it being a living hell when it was bad, but it will end.
Sometimes the dread of a bad night was worse than the actual night for us. Sometimes they surprise you