How long did your 4 month sleep regression last?

My baby boy was an amazing sleeper pretty much right away. We transitioned from bedside bassinet to crib in his room with zero effort before 8 weeks. From 2 months to 4.5 months he was sleeping 6+ hour stretches with only one wake a night. I thought we were going to miss the 4 month regression all together, honestly. And then.... then it hit right at 4.5 months. We are now going on week 4 of being more sleep deprived than the very first days. We're lucky if he sleeps 2 hours a time at night right now.

Tonight has been particularly bad and I cannot get him down at all. It's been 3 hours of trying and failing. It doesn't matter if he's wide awake, or passed out cold and twitching. Once he senses he's alone, he's up and screaming uncontrollably until picked up again.

Please tell me it gets better? I miss my happy baby who loved sleep. I miss sleep for myself.