Just want to sleep

Br

My son is 5.5 months old and the last 3 nights he has gone to bed just fine at 8. But around 11-12 he wakes up screaming and there is no way to calm him. (Give him paci and he just screams more) we fight for over an hour trying to get him back to sleep. Last night he did this twice. Idk what to do. We have started just putting his bassinet next to our bed so we can just reach across instead of getting out of bed. Do they get growing pains? Sleep regression? I’m not sure it’s teething. There is a bump but nothing rough. I’m going crazy and I don’t handle interrupted sleep well.