He could have helped, especially as she helped him with Gallifrey. He left her in Victorian London & again in Glasgow. This Doctor is very unpredictable, and it's very scary when you used to trust him with your life a while ago. Before he regenerated she knew the Doctor in every detail of his life because she'd been INSIDE his timeline. Now, he's just so blurry, and very different from Eleven. I would be constantly afraid if I was Clara, so I understand her reaction." ~ taken from FB
Foreshadowing Donna's fate. Also, I'd like to point out that she doesn't actually lose her memories: it says above in the Dr. Moon photo "I saw the Doctor! Yes, you did, and then you forgot." They're still there, locked away, like dreams you can't remember when you wake up. She's still a time lady! Just like the fob watch thing, but without the watch.