Yeah you got some serious talent! And as people just said, there are always similarities with different stories, or indeed any art form, what have you got to lose?
Right now you lose all the time and valuable artwork with nothing to gain. Also a lifetime of regret and not knowing!
On the the hand, if you release it perhaps you lose some money, but perhaps it's super successful?
I once filmed a friend's band in a church. (I wrote a story about it here, not intending to be a shameless plug but relating). I never gave them the videos as I thought I did such a shitty job, recently opening them has made me realise I was stupid and should have just sent them, it's no big deal and they're not bad at all. Slightly different circumstances as you don't have doubt in the quality of your work but the regret will feel the same...although your situation could genuinely do really well!