T.S.
My baby girl used to head butt me until I woke up and played with her or tossed her off the bed - cats are nocturnal and they really liked to be loved more than people think, they probly just want to be in the room with you but you don't want that so you may have to just deal with the crying until they realize your not letting them in or let them in. I bought a small cat tower/play thing and put it right next to my bed so when they start to bother me I put them there and they noarmally quit bothering me. Hopefully any one of these things help. good luck.