just updated to iOS 11.2.1 tonight but now my iPhone SE 16GB is stuck on a white screen with black Apple logo with bar underneath it (showing how much of update done)

haven’t been able to use it since i plugged it in when i got home

tried the home/power button reset many times

tried home/power/vol up reset

tried home/power/vol down reset too

all to no avail

any ideas, or do i need to take it to Apple specialist ?

it’s 1.40am my time AEDT as i write this, so keep any suggestions coming and i’ll try tomorrow when i get up as i’m off to bed now