Baby is 11 weeks today, EBF, we were doing OK, not much of a schedule but 4-5 naps a day with 60-75 min wake windows, nighttime was usually one false start (fed to sleep and transferred fully asleep) then a couple of good stints - say 1/4/3/2 (feeding on every wake but could usually put down without being fully asleep in the middle of the night), not a naturally good sleeper, but we were making consistent little steps of progress it seems.
BUT last few days have really seen a step back. He's super sleepy during the day, yesterday had almost a 3 hour nap, fed a bit then fell back asleep! Nighttime regressed to hourly wake ups, hates being put down so only goes down if fed and then transferred fully asleep - which can take 30 mins so barely worth it if he only sleeps another 30 - we've had to revert to co sleeping with basically constant access to the breast.
SO the question is do I actively challenge this - i.e. stricter during the day with waking him from his naps, more rigid/patient with putting him in the cot at night - or is this just a phase and I go with the flow if he needs the naps and the feeding? Little lad is already pretty big at 7kg/65cm so whilst I can't imagine he needs to get bigger I'm wondering if it's another growth spurt? I read a lot about sleep regressions and maybe that's it - but just wondering if people try to keep 'good habits' or do they just go with what the baby wants/it'll resolve naturally/just hang on for dear life until they're old enough to sleep train??