Why is my son so upset?

My son is almost 12 months and is learning to walk but he is screaming a lot through the day for no reason, he doesn’t want us to play with him, he doesn’t like to stay in his Walker too long, he eats solids and eats fine, he is still being rocked to sleep for naps and bedtime, we co-sleep, but he wakes up a lot through the night. The crib is a no go he hates it.

I have no idea what’s wrong with him.

Any ideas?