My Dream.. Visitation or just another night?

My mother passed away in April of this year. We hadn't always been close, but over the last couple of years we had an unbreakable bond. A couple of months ago... in September... I was taking an afternoon nap...which is not a common thing for me considering I am a busy mom. During my nap I had a dream... or at least I what could be considered a dream. Within the dream I was in what appeared to be a bathroom in an office building. I wasn't sure what the signifigance of the location was. It wasn't a place I had ever visited before. While in there my cell phone rang. The screen was completely blank so I had no idea who was calling me. I said hello twice before I heard a faint voice say "Jen?". I immediately knew that it was my mother's voice and began to cry. We had a brief conversation about things that were happening in my life and the lives of my sister, brother, and step father. There were other elements of the conversation that I wish not to dissclose because of personal reasons. She told me things that I had no knowledge of at the time, but have since made perfect sense to me. As her voice began to fade out,we closed the conversation with our standard "I love you's" and "goodbyes". I woke to my cell phone ringing... which was ironic. When I woke, though, I didn't have the slow motion syndrome of having to take a few minutes to get myself prepared to roll off the bed. I woke up with a jolt of energy which could have easily been explained by the power nap. I can't help but wonder. though, was my experience a mere dream... or did I really experience a visitation from my mother. I've always known that it is sometimes easier for our deceased loved ones to contact us in dream states. I myself believe that it was indeed a visit from my mother. It had to be.. it was too real not to be. I am very curious to hear comments or like stories. I have some other experiences that I feel were the product of my mother, but I wanted to start with this story and see if anyone else has experienced something like it as well.......