My advice, don't do anything immediately. People are going to be keeping an eye on you more than usual, and its very likely that you will be saved from your next attempt as well. I failed in my attempt on 2nd August. Ever since then, I have been doing what I have been doing for 33 years. Putting up fake smiles, reading encouraging books, connecting with friends and family. I am just buying my time till I can ensure that I will be alone and undisturbed again. And then, try something and get it right this time. My last CTB attempt was 100 tablets of cetrizine (10 mg) and 95 tablets of paracetamol (650 mg). Planned to take 150 of the paracetamol tablets but had passed out when popping the 95th. I was found about 2.5 hours later, and taken to a hospital 3 hours later. Its all very hazy right now, but my wife (soon to be my ex wife) had brought cops and broke down the door and taken me to the hospital, after some of my final messages to her raised suspicions.
Bottom line, don't try anything immediately. Buy your time, put on a fake cheerful persona (something most of us should already be experts by now), earn everyone's trust, make sure they believe you want to seek help and live a long and fulfilling life, and then go for it when you have the chance.