Self soothing regression (17 week old) How to re-establish?

[eightyone]

My son used to self soothe fine from about 5 to 11 weeks (at night only, has always needed help to nap in the day). He went down in basket/cot awake, swaddled and then after 15 mins or so fell asleep.

Since around 10-16 weeks he has began to fuss when put down wide awake and needed to be fed/rocked into a drowsy state before being put down. He still went to sleep the first time he was put down.

Over the past few days however he has regressed and now when he is put down in drowsy state he cries/fusses. I tried patting/shushing him in the cot but it doesnt work and he gets more distressed, so I pick him up and he calms almost immediately. I then put him down again and the process is repeated several times. Eventually I manage to get him to sleep by putting him down on his side and patting his back (he sometimes sleeps on his side himself so assume SIDS risk is low).

This is fine for the first put-down of the night but the same occurs after he wakes for a feed. He wont go down himself and I am too tired to go through the process for an hour or so....so I end up cosleeping with him which I dont want to do for most of the night as it stops me from sleeping deeply. I usually cosleep/feed him around dawn to keep him sleeping longer but dont want to do this in the middle of the night.

Any suggestions?

Should I just to sacrifice a few nights good sleep and persevere with putting him down after night feedings?

Is patting him to sleep in his cot helping him to self soothe anyway?

Was it the cosleeping/feeding him for naps and around dawn that has ruined his self soothing in his own cot do you think?

I was going to start getting him to nap in his cot at home (usually naps in his swing at the moment) should I attempt to get him used to napping in his cot at the same time as tackling his night self-soothing or should I wait until weve cracked these night time issues? (He has almost outgrown his swing so he does need to start napping in his cot in the next month of so).

I was going to buy one of those light projector toys for him to watch which I think he will like as he used to like watching his mobile, but I think he got bored of it.

I experienced this with my 6mo DS. He totally refused to nap without rocking (although was fine at night). It started at 4 months, for no apparent reason.

Do you have a nap routine? It took a while to implement, but in the end saved my sanity. Every time DS shows any signs of tiredness I pick him up, tell him it's nap time, put him in his grobag in his cot, put his mobile on and leave the room. It usually requires a couple of dummy re-plugs but he falls asleep by himself without tears or cuddles every time and I no longer want to run myself over with the car

Going by my own (limited) experience, I'd say concentrate efforts around self settling and naps using shush patting etc. Do what you need to to get through the nights, if possible try to put baby down almost asleep but not quite in the night, but don't worry too much if you are wrecked, as long as self settling isn't totally forgotten then I reckon eventually it will get better in the night on its own, that's what happened with my dd in any case.

I did the nap routine thing too, same thing before every sleep so she knew what was coming, its that baby whisperer, set the scene, sit quiet, shush pat thing