I have Iphone 6 Activation Lock What do I do?

I have Iphone 6 This morning I woke up & my phone reads Activation Lock

I summit for I Tunes to call me. but I was thinking my phone doesn't work. LOL

I have forgotten my apple ID & also Password What is the world am I going to do.

I am a very old woman I think I know my ID but not my password