Signs or Coincidences

Are there really signs from our deceased loves ones or are there just coincidences that we turn into signs? I believe in signs and no one can tell me otherwise. If they did, it would just be their opinion as no one will ever know the answer, at least not while we are here on earth. I was at a family celebration yesterday and for a fleeting moment, I could not wait to get home to call my mother and tell her about it. It was a thought or maybe a familiar feeling, that lasted a nano second, where I forgot that she was no longer here. Once my mind was back to the present, I felt bad that she would never know about the wonderful day. When the event was over, I got into my car to leave. As we pulled away, on the windshield was a tiny bee, right in front of my eyes. It was walking up and down, almost like it was trying to get my attention. My husband never noticed it as it was only in my line of vision. This has happened twice before. Once was when my husband had surgery and I was eating dinner alone, a bee appeared on my food and walked up and down then flew away. The next time was when I was driving back to Long Island with my father. The bee sat directly in my line of vision and rode with us for miles, looking into the car. Prior to her death, I had never had any encounters with bees. I would have remembered one, as a bee usually frightens people and when we see one we take notice. I truly believe that the bee yesterday was a sign from my mother saying that she did in fact see what was going on. I wear a glass bee around my neck and her name was Bea. Sign or coincidence?