Any other mama's out there felt as horrible as me?

I'm 22 weeks pregnant, and couple times my 2 year old son has woken up from bad nightmare.. I can't seem to leave him without fussing for me. He's normally a great sleeper, and 2x it's happened... Sleeping on floor at 22 week s is just bad and I take him to our guest room with me on a full bed and we sleep. 1x he rolled off and fell off and of course I wake up screaming finding him on his butt on the floor. I feel so terrible, pick him up and kiss him and sing to comfort before we head to his room. This same thing occured again following night, this time I took him to our bed upstairs on our queen with lil more space and my husband takes the guest room. normally I'm a light sleeper but prego at 22 weeks it's impossible! I feel so terrible after 2x it's happened 😭 my husband helped me out sleeping on other side of him and our son was in the center.... basically were like human shield! I'm considering buying bumper for times like these are easy and temporary!!!