Sleep roulette? 😴

Has anyone else put their baby in their own room now playing sleep roulette 😂 He's never been the best sleeper but this week it's getting harder not easier. He goes down absolutely fine and I've even given him a bigger bottle before bedtime to see if it's that but no joy. If he woke/ whinged in his next to me I would put his dummy in or stroke his face and he'd go back to sleep so we'd get a decent sleep. We transitioned him into his own room and he was doing the same maybe with a couple more wakes at the start then it was only 1 or 2 but this week he's waking up and is upset needs comforting or a bottle to settle and is then awake a few hours later. Obviously we are wondering if it's growth spurt/ new skill/ teething/ sleep regression or just a bad week. Has anyone got any ideas to help or going through something similar. Baby will be 8 months on the 19th xxx