Wait, you are suggesting that putting your secret out there before attempting will ensure you follow through because things will be so awful that you will have no choice but to CTB???
Interesting theory, but I would advise against this strategy. It is way too risky in my opinion..
First of all, what if you are wrong and SI kicks in despite the "revelation", and you still find yourself unable to CTB? (You think this will override SI, but there is really no way of knowing for sure...human beings are not great at predicting how things will affect them, and SI is biologically based and often has a mind of it's own...) If that happens, you will still be alive and your suffering will be 100 times worse...
As others have mentioned, no matter how carefully you plan things, death is not a guarantee. Let's say it works and you do override SI, but you survive your attempt... You could end up permanently disabled AND with this horrible secret out there...