Facebook Mobile only showing from one friend.?

While on Facebook, in the last 10-15 minutes, a text Facebook notification popped up. I clicked on it and now, I am only seeing pozys from her. I fid try and go back, but got the Facebok version of "This page cannot be displayed". I tried again and got a notification that all conversations will only be seen through Messenger. I picked up my old phone, and was able to use the moble Facebook. This is mildly frustrating as I use the phone on which Imhaving problems as my cell/phone and get on-line when Im out and at home. (I use our home Internet with the old cell and my tablet). Is there a way I can go back to the old Facebook Mobile?