My problem just started.  I sent my husband s tect which was part of a thread and about an hour later I couldn't send another as I was no longer a participant of this conversation.  I have a Note 5 my husband has a Google pixel.  As far as we are aware there were no changes to either phone.  My phone did go through several restarts as it continually said I didn't have a sim  card. I csn send messages to him through messenger.  Can this be fixed?