It's a nice story anon, one could chalk it up as just a coincidence, and that that man could have happened upon anyone and the probability of him coming to a non-believer was high assuming you're in an atheist-dominated country. But what I love to remember is that, if Christianity is true (and I'm still working through this stuff too) is that there are no coincidences with God. Everything is sovereignly ordained by the Him. I love it when some thing happens to an anon and they're like "omgosh this *insert seemingly random insignificant thing that happens all the time to people* and I just know/think it might have been God talking to me/showing me a sign XDDD" and anons come back with "meh maybe probably just coincidence that you're reading into these things happen to people all the time." Maybe that's the case but the way I look at it is that, owing to the fact that everything sovereignly ordained by God, if you choose/happen to see God in it, and it gives you faith and hope and makes you contemplate His goodness, mercy, justice, power etc. then by all means I don't think there's anything wrong with taking it that way. In essence, we're supposed to see God in everything, to a certain extent, due to this divine sovereignty (except for sin and evil ofc, and even that to an extent, just finished praying about how thankful I am, in a sense, to be where I am now, provided with the opportunity to overcome my sin, knowing that I can with Him, and that He will be glorified in my obedience, in the heat of the moment, to turn away from sin and to turn to Christ - see Genesis 50:20*).
So long as the thing you've seen/experienced isn't leading you to dwell on/obsess on material benefit, empty pleasure derived from something other than God and go into crazy heresy (what prosperity gospel is as far as I can tell) and instead it provides you with a prompt to dwell on His goodness, what he achieved for us on the cross, etc, and worship and revere him more, then go for it. I may have had experiences like yours, maybe not quite on that level, but the little tiny things that make me think of God's role in placing me in that time and place and makes me think of Him (although I feel I may have only experienced snippets of the lovely feelings you describe) that maybe most others would again chalk up to coincidence. But like I say, if we are in Truth, there are no coincidences. However, of course, just because you experience these things does not necessarily make it (Christianity) true. We rely on a range of other things to testify that, although again personally depending on the circumstances/experiences I would say there's nothing actually wrong with incorporating those into your catalogue of reasons you believe. Unfortunately the skeptic in me still has the niggles that remind me of this fact (that such experiences do not make it true) and that if not true, I am literally reading into experiences like these things that are not actually there, but praise God I still feel like He is wooing me and I am growing in faith.
TL;DR some may brush it off as coincidence, but there are no coincidences with God. To an extent, ultimately it's up to you to do what you do with your experiences and how you relate them to God.
God bless
>*As for you, you meant evil against me, but God meant it for good