i keep waking myself up from talking in mysleep! How to stop!?

[Kristina]

Last night I went to my cousins house to go hang out with her and her friends ,we went to some bars and then came back and hung out then went to sleep...and i kept falling asleep and then waking myself up cause id hear myself talking! And about the third time it happened i woke my cousin up and was like omg are you hearing me talk in mysleep!!??! and shes like 'yeah i hear you mumbling over there i just dont know what youre saying!' ahaha it was so embarassing! I do this time to time for like maybe a couple weeks straight and then it goes away. Why is this happening and how do i stop it!? Im afraid to sleep cause ill just wake myself up again