Hi hon.
We could say welcome home, but then I've been lax, and dinner isn't ready yet. Our standard boilerplate is to see a therapist - they'll help you explore how you feel, and allow you to settle in to the new found knowledge of yourself.
Does wearing a packer change who you are? Not in one bit. Does exploring gender make you less 'you'? No. Does liking the packer and dreaming about it being a permanent feature change you? No. It could lead to a few interesting questions, mostly for yourself about what it means to you to express in this way. How strong those feelings and desires are, depend on you, and honesty to yourself.
Now, just to get over a small hurdle - cis folk generally don't think / do / try / question themselves or challenge themselves about presenting in anything other than the gender they identify as - trying, for yourself, and enjoying this experience, could mean that you are comfortable in the role but are not comfortable expressing as that identity full term - a banner under which sit those who cross dress, or perform their role - are you a King, my dear?. Or it may be more fundamental - it feels like it answers some deep question that you never knew you'd asked of yourself, in a way that makes yourself feel more whole.
All of these place you squarely under the trans umbrella - maybe not non-binary (who knows where your journey may lead), or maybe it will.
Personally, my gender identity is complex - feminine in some ways, and neither as well. They're quite delineated around aspects of my life, but it was only after introspection that I was able to rationalise my world under non-binary (long story, messy, needs ice cream, a really rubbish sentimental movie and a bottle of wine), quite a shock for someone who generally is seen to fall into the AMAB camp - but it was only through self knowledge and introspection that the knowledge of what my gender is, and that it doesn't match that which I was assigned (that prompted questions of sexuality too... as my perspective shifted).
Have fun, enjoy how you feel, talk it through with a professional, and most of all try to enjoy this - it's the journey we all go through to find out who we are.
(Hugs)
Rowan