Here is my opinion.
The reason suboxone 'wont work' for you is that you are not using it properly. Google it, I mean there are millions of pages telling you the same shit...12-24 hours for oxy, 24-36 h, etc.. and those are on the low wne
If you are dependant on H waiting 12 hours is usually not enough. Taking bupe may not throw you into withdrawals if your lucky but youll still feel like shit for 3 days until the bupe levels in you stabalize. Its really risky to take bupe 12 hours after your last dose of H, even oxy if you are really addicted with a tolerance..just ASKING for preciptated withdrawal.
Now if you wait 24 hours or even better 36 or 48 you will only get BETTER results. Thats the challenge though, getting through the day or two of bad withdrawals.
It is really worth it though..honestly the longer you wait to take suboxone the better you will feel.
Keep doing heroin and get your tolerance up their and pretty soon, the suboxone won't work for like the first few days. I got to point where I would get really dope sick, after 12 hours of my last heroin dose. So I had a choice, go cop more heroin or take my suboxone, because at this point I was so sick I couldn't take it anymore. The thing is though If I would take the suboxone It would throw me Into the worst withdrawals I ever had, so I would go buy H to take the sickeness away. I would keep doing H until I was brave enough again to attempt to take my suboxone. I would have to go through like three days of feeling like shit, even with taking the suboxone until I would start to feel semi good. So be careful because their is a point where the suboxone stops being as effective as when you have a low tolerence.
Oh and btw I can safely say i have a good amt of experience with this.
I do agree that the longer your run is and the higher your tolerance gets, the switch just becomes harder and harder. After 3 weeks of use, its fucking HELL to get to the 24 hour mark..hell its fucking death to get to the 12 hour mark. Withdrawals won't kill you though, and your tolerance drops rapidly while your withdrawing.
But I have switched back and forth countless times and the switch has NOT gotten progressively worse with time. If anything it's easier now because I am on bupe more than H now, so I try not and let my self get to the point where the withdrawals are unbearable.
A good medium for me is using for 1-2 weeks then having a real shitty 24 hours until I dose my first bupe. The longer my runs are the harder it is to sit through that withdrawal and the worse the cycle gets..
I dunno whats worse, withdrawals, or fear of withdrawals.
Lastly, I will say that I have experienced exactly what you described above, and it was from taking the bupe too early. The times I have some how forced my self to get to 36 hours I have felt 99% within 1.5 hours of dissolvin the bupe