5 month old won’t sleep

Jessica

My 5 month old was the BEST sleeper when he was a newborn. Like 4-5.5 hours stretches, feed and back to sleep. Now he’s up every 1-1.5 hours throughout the night for the last almost two months. We have occasionally gotten some four hour stretches but that is not the norm. No sleep is catching up with me and I am so frustrated. I thought it was just the four month sleep regression but this has lasted too long. Help please😭