It would be nice of her if she spent more time explaining how she feels and at least give you a sense of closure.
It is likely nothing you did, otherwise she would have probably told you. Was she married before? How old are you two?
It seems like neither of us can assume the reason she left, but your actions should be reasonable, no one can expect from you to read her mind.

If she wanted to talk to you, she probably would not block you from contacting her in every way.
This is a very fresh wound, cry it out for few days and talk to your friends. If you have mutual friends then you could maybe ask them if they know anything about what happened, if not, there is nothing you should do here as it seems clear she doesn't want you to bother her.

Either way, I am sorry man. I know it is very painful and that the pain will last for months, but you will get over it as long as you let it hurt and work on it.