Waking up screaming

My little guy has never been the best sleeper but the last month has been horrible. He wakes up 4-7 times a night always screaming. He does not eat during the night and I can usually get him settled and back to sleep but my husband and I both work full time and I’m currently 13 weeks with baby number 2 and I’m so exhausted! Any tips? He is in his own room and eats a bottle about a half hour before he goes to sleep. We have not changed anything in our routine, but clearly something has to give because I am a zombie and need some sort of sleep. Sometimes he wakes up less than an hour after going down. No matter how many times he gets up and how little sleep he gets he still wakes up in the morning at the same time, and still only takes 2.5 hours of naps total during the day too. Thank you in advance for any help!