Hearing Someone Speaking To Me

It was late at night, I woke up to go to the bathroom. As I lay there, pausing for a moment before turning on the light, I heard, close to my left ear, a clear, calm, voice and it said "Hello." That's it.

I don't know what to make of this. I heard a voice only once before, when I was five, and it was behind me and said my name, "Debbie."

At first, I thought there was someone behind me. I was in a large parking lot - alone. I got scared and told my mother about it, and she said, it was the Devil trying to get you. I was so frightened, I never wanted to hear anything again like that.

But recently, I have been through a lot and it has sensitized me. I went through Stage 3 breast cancer, and chemo and radiation, etc... I lost 2 family members who were close to me. Most recently, my sister in 2009. And, recently, I have been asking the Holy Spirit to speak to me.

Any ideas on what I experienced?

Thank you, in advance, for your help.