Q: iMessage troubles. Could not sign in.Please check your network... PLEASE HELP

So ive been facing some problems with my imessage just recently. It happened abruptly just after 5 minutes of my last message to my friend. Ever since then i can no longer send messages with each one saying it failed. I decided maybe to relog my imessage account only to find that i keep getting an error saying could not sign in. please check your network connection and try again. Does anyone know how to help?