Pregnant with a 11m old

Im currently 21 weeks pregnant today and i have a 11m old and a 3yr old💖. My 11m old is super clingy. He also wants to sleep with me EVERY NIGHT. (I literally get less than a quarter of the bed😢). And he knows when we put him back in his crib. He wants to be held and lie down down on my stomach all the time. He also kicks and slams his head backwards(i hate this😕).My 3yr always wants to play fight everyday and gets mad when i tell him i cant (hes pretty tuff and hits hard lol💪)(they're both boys). I just need some sleep before this baby comes( i will probably never sleep again😰😫) and forget about it if i try to let them play together because ill never hear the end of the fighting and hitting over toys ( why cant they just get along and share😲😟)