Kept waking up

So my LO is 8 months and we just spent 2 weeks at my parents house. Whilst we there, I co slept as they didn’t have a cot for us. Now that we’re back home, LO slept so awful during the night. Wouldn’t settle, wouldn’t go back to sleep, would keep waking up when we would put him back down. Could this be because he’s gotten used to sleeping with me on a bed? I didn’t put him in the bed at all last night as I don’t want that to continue now that we’re back. Maybe during the days for his naps here and there (especially today as I’ve had 4 hours sleep, maybe even less). What can I do to make him used to his cot again? The journey yesterday took us 3/4 hours including stops so he’s probably trying to recover from that and he’s also going through a terrible teething phase so I think it’s a mixture of everything? Any thoughts/advice?