Iphone7 and iPad iMessage sync

My iphone 7 and my ipad always sync my messages. I updated both yesterday to 11.1 and now my messages will either appear on ipad or on iphone, depending which device i use. I have gone to settings- then messages. I have clicked iMessages on and off several times. My email appears under Send SMS on my ipad and there is no checkmark. When I click on my email address nothing happens( it is in grey, not blue).On my iphone, my phone number appears. I have turned the messages on and off several times, i have rebooted my ipad, i have gone on line and cannot find anything else that anyone has done. They where successful But somehow mine will not sync.