Need advice: it's long but please read...

My son has been fully potty trained for 6 months with 0 accidents, he has woken up with dry diapers since 18 months. Since being potty trained he has only woken up to go potty twice. Now, it's every single night for the last week and a half. He normally comes to our bed a couple times a week to sleep, but now he's doing this. When he pees it's the tiniest amount ever, and he goes before bed AND has no liquids before bed. Then after he's done he gets dramatic, needing dada to lay with him, needing to give us each our own stuffed animal. Full on having conversations at 3 in the morning.

I know he's doing this for other reasons than the potty, but idk why or what to do!!!! I'm due in 5 weeks, and baby will be in my room, where he comes to potty. I need help!