Baby Won’t Sleep Alone 🤦🏻‍♀️

So my son was doing really great at sleeping in his bassinet over night. During his 4 month sleep regression he basically became a newborn again with how often he woke up and was feeding. I fell asleep nursing him a lot (I work full time I was a zombie) and so he got to co-sleep pretty much every night the past month. Well now he won’t go back in the bassinet. We’ve tried everything! He’ll instantly wake up and scream or if he was already awake starts screaming. Are 5 month olds normally clingy with mom? Will this pass? I NEED MY BED BACK