“ TERRRIBLE TWOS “ MORE LIKE TEENAGER VIBES

So my little boy has been recently, been acting out of control lately ! Worse then before ! He now yells “ It’s Mine “ Throws tablet , pulls my hair , bites , pinches , hits , throws things and just screams “ Noooo “ just terrible . I do put him on time out but he doesn’t take it serious. I lay him in his bed until he cries it out and that works for a while.. but throughout the day he just bad.. and when he’s sleeping he cries out of no where.. not sure if the sleeping part might be nightmares he’s starting to get or.. idk I’m just overwhelmed by his behavior and I’m pregnant so idk if that might be messing with him or not but I just need help.. idk what else to do . I give him all my attention not sure if it’s just normal for a 2 year old to be acting like this..