Yep sleep regression is a b..
i haven’t had a sleep regression yet and my baby is 6 months but i can say we had some rough nights. when we do, i offer pain relief, a paci, and some calming interaction. sometimes none of that works so i just let him hang out in his bed for a while to talk to himself and roll around until he gets really fussy which is when he falls asleep quickly after i help him.
Same situation here
How do you feel about losing a family member? Maybe your baby feels what you and your relatives feel. I know it is difficult, but try to stay relaxed. Talk to your baby about everything is going to be well.
What do his wake windows look like? They could be too short or you need to remove a nap! It’s also suggested around five months to make bedtime sooner with the elimination of a nap