What’s real and what’s not?

As you probably know I have no memory at all of getting taken to London and proposed to, but I know what the engagement ring looks like. What’s SO odd is I must have made up a memory of my mum standing in my old bedroom talking about getting me a ring (which is suspect as it looks exactly like my engagement ring!) as a Christmas present. It’s definitely a ‘made up’ memory. Makes me wonder do I have any more made up memories?! I don’t know and no way of telling what’s real and what is fabricated! Damn brain injury!