Yes, I do believe it was a "Hello" from your folks. Timing is everything. And our Loved Ones in Spirit do often move things to get our attention.
Be sure to speak to them and let them know you noticed. Your thinking of them pulls them closer to you and you just may get another ADC.
There is the book "Hello From Heaven" that may help you with some of your questions. It is very gentle and comforting. (One of the authors hosts this website.)
