Night time screaming

My 2 year old has been screaming non stop as soon as 1-2hours after putting him to bed for the past 4 days and his cries are inconsolable. I am feeling so stress as I am losing patience for this and this happened before awhile ago and i think its night terror(?) but this time im not sure whether it is also night terror as he dont look frightened or want to run away but more like he just wants to scream non stop and will stop for awhile and start again. He is currently under the weather as well (cough and runny nose) and im not sure whether it has also contributed to making him so fussy at night. Any advice? Thanks in advance....