Few minutes ago someone downvoted all my question and answers in stackoverflow.com.

[My reputation today][1]

As you can see in the picture:
![bullying][2]


It's unethical, drops my reputation and my tags points.. 


  [1]: https://stackoverflow.com/users/1964435/math?tab=reputation
  [2]: https://i.sstatic.net/fQVmT.png

I would like to know who did it, why and how to revert this?

I appreciate.

**EDIT**

I didn't know about the meta sites, I already created one account for me and will post properly in the next time I have a similar situation. I kind of freaked out and made things hurried. I posted in the wrong place I know, don't need to downvote this question anymore.. This situation is done. Thanks.