Howdy Jeremy and welcome!
the standard answer to any such question in this forum is "have you read Daniel's book 'Mastering the Core Teachings of the Buddha'. So..have you? If not, you really should as it will give you an idea about how a structured practice will bring you through more or less predictable 'stages' or phenomenological experiences. this is a good basis for discussing things here as it tends to keep things bound to earth as far as one can with this stuff.
in any case, my advice as to your current practice is to pick out one of the sensations and stick to it like glue until you can relly clearly see what is the actual sensation and what are the things your mind is adding to those sensations. take this with a grain of salt and know that more and consistent practice will move you along more quickly.
that said, take a look at the dark night sticky threads up at the top of the discussion forums to make yourself aware of some of the things which MIGHT await you. ... and read the book, available free on line
here or as a PDF.
have fun
tom
