a good night's sleep

Fighting for blankets which has resulted you two bad sleep. Well, you can either buy another blanket which you no longer have to share one, but where is the intimacy and fun in it if you are not in the same blanket? I don't really like to sleep with blanket, so I have never fight over the blankets with my girlfriend. She can have the whole blanket if she wants. But normally she would ask me to share to that we can hug and sleep.

Perhaps you both should have separate blankets. Sometimes that helps. My husband doesn't like the feel of microfiber material so he has a blanket he likes to use and I have one that I like to use.

Either each have your own blankets or invest in a duvet/comforter.

if you want can good night's sleep, my advice, get used to sleeping nights on a regular curfew. Regular curfew could create a biological clock to good rest

I wonder why you keep sleeping together sharing the same (small?) blanket and fight whole night about it. I would advise you both to have separate beds/matrasses and blankets. And have some good night rests first. Might take some time before you have them since fighting about the blanket is already a habit for both of you.

If that is really the main reason for not having a good night sleep, I think you should use a bigger one. You don't need two blankets if you want your marriage to workout :)