I disconnected and i cant rejoin, is that happening to everyone or just me?

Did you get an error?

I'm getting that almost twice daily irl. Generally, I find it helps to press Quit Game and then relaunch MC. Is it a Java Socket Error? That would mean your game crashed of too much lag or of bad connection.

It happened again D:

It looks like these posts are coinciding with restart. Every day at midnight and midday server time, which is about 2 hours ago your time and 10 hours time, the server kicks you. It stays down for approximately 1 minute and then allows you to come back on again. It is a quick on and off again of the server to help keep things running smoothly. There is a 5 minute warning from Broadcast every time. 

VastCreator3547:

It happened again D:

It was just my internet stopped working 

As what FunMummy said, these disconnects are usually client sided (your end) or from the daily resets every midnight and noon.

Fortunately, you'd be notified in the chat when a server restart begins in the next 5 minutes so take it as a notice to change to the Creative Server so you can wait out the restart there for the next 1-2 minutes. Then rejoin.

No, once I disconnected during POTW, couple days ago I disconnected again right before the FunFight. I've disconnected even when it wasn't during the server restart.

Yes, that sometimes happens. People disconnect from the server for all sorts of reasons. It can be to do with their Internet, or to do with something unrelated to the server or their wifi. There is a lot of world between our houses and the server's location and a lot of things can have issues in that space that none of us have control over. Things happen.