I get woken up in my sleep at least four times throughout the night. My daughter is screaming only for just under a minute. she is not awakened from this but is leaving me wondering what is happening
Although stressful for a parent, this is very common, and most likely nothing to be concerned about. It will likely pass as the child gets older.
When it happens the best thing may simply be to sit beside the child for a while and gently stroke her shoulder or back until she calms down. Lifting the child to try to console her can sometimes make things worse.
You may also be able to look at your bedtime routine, and see if there might be ways to make it a more calm, peaceful experience. Sing lullabies, read peaceful happy stories (nothing scary, or even exciting).
Another thing you could try is playing some kind of 'white noise' throughout the night. We have started playing water sounds and this seems to help our children to go to sleep sooner, and sleep more soundly. We just use a spare mobile phone playing the water sound on a continuous loop.