Thanks for sharing your experience.
Some of my rambling thoughts on the matter, fwiw.
Our minds come up with all sorts of things, some of little consequence and some very consequential, some weird and wonderful.
Personally, I don't spend too much time trying to find explanations for these things, rational or otherwise.
Do we sometimes meet with our minds from the past or future? Why not? Time is not as fixed or linear as once believed.
Is it just content being created by the monkey mind based on all of the input over a lifetime and more? Why not? That does not mean that it is not very significant and meaningful.
Fortune telling and astrology are not set in stone and are not death or illness sentences, they are simply constellations of external conditions and how they relate to our own constellations of internal conditions.
I was in a similar state as you coming into my 60th year - warnings from Tibetan and Chinese friends and so forth.
Fortunately, nothing particularly bad occurred for me.
I don't brush off my weird little mind and I don't take it too seriously either.
I don't brush of horoscopes and warnings and strange experiences, like meeting with a past or future self, or having visions, and I don't take them too seriously either.
I do recommend attending to healthy choices as best you can determine them. Your body is aging and needs attention and care. It's the only one you get. Much of life in our technological age is unhealthy for the body and mind. If it means listening to an inner voice or a voice from the future or past, that is fine. No need to analyze or judge its veracity, it's still just another voice. The important thing, IMO, is trying to recognize the source of that voice. Does it feel authentic or is it based in emotional reactivity or psychological baggage? Does it come from the source or from pain and ignorance. Is it the Dao speaking and flowing through you or rumblings from an unhealthy or overly indulgent meal? Is it a future self or an ancestral trauma? Does it matter?
I think it is most healthy to find something to trust, something that is not dependent on the monkey mind and labile emotions. Something not rooted in conditioned patterns coming from ancestral, social, and cultural trauma and dysfunction. For me that is one major benefit of my meditation practice. I think it could be helpful to sit quietly and be very open and still for a time. Once the mind and heart are somewhat settled and open, drop a question in like dropping a pebble in a calm pond. A question like, can I trust this inner voice, is it authentic? Or, shall I engage in this new qigong? Or, do I realy need these supplements? Just one at a time. See how it feels, not thinking about it, just allowing the ripples to arise and spread for a time. Leave them be after asking the question, don't engage, just remain open and present. Then continue to sit in that stillness and openness that returns once the mind has once again settled.
I find that whatever comes from that quiet and still place is authentic, it is something I can trust. Maybe more precise to say it is something I have chosen to trust. I find that what comes from that place tends to be more accurate and dependable than decisions made from thinking or emotionally charged responses. The key is that one must be able to truly rest and be open to the stillness, silence, and spaciousness of body, speech, and mind.
Whatever happens, whatever comes for you in this year of the Fire Horse, you will be OK. Situations and circumstances change. Our capacity for being open and present and responsive to the situation is always there. If we can trust in that, we can be OK even when we're not OK. I may sound overly confident and certain and I am not. I also worry and get distracted by thoughts and feelings all the time. Health, family, work, politics, finances - all sorts of worries and challenges. What I am saying to you is an externalization of what I tell myself and try to practice.
I'm reminded in this moment of the Theravadan monks currently walking from Texas to Washington, DC - 2,300 miles. Simple human beings without any particular physical training walking everyday through the harshest of conditions, -15℃ with windchill much lower, through ice and snowstorms... all to raise awareness of the potential for peace in our country and in our lives. WOW, what power! What courage! What resilience! It boggles my weird, little mind. They are OK, I am OK, you are OK, even the poor monk who lost his leg to an impatient driver is OK, and yet... it's OK to not always be OK.
Sending you warmth and good wishes