I've lost the use of my Galaxy S6 emojis, how can I get it back?

[AC Question]

I've lost the use of my Galaxy S6 emojis

I notice that there are special emojis I can use when I text other Galaxy S6 users. However, lately I am unable to use most of my life and the ones I can use ate defective. Has anyone else experienced this? Is there a way to fix this without rebooting my phone? BTW, how can I back up my music on my phone? Thanks a million! !!