That schematic is nothing like what we have been talking about and will not work.
Who gave it to you?
Why don't you return to what was almost working and make it work?
Since your presentation is in about one week, surely you must be interested in efficiency instead of launching off in a completely new direction. Hint, Vcc and ground to a 555 should not be supplied through a capacitor. I mentioned "decoupling" capacitors. Did you misunderstand, and is that what you are attempting to do? The decoupling capacitor goes between Vcc and ground, not between Vcc and the supply. I suggest you look up and read about decoupling capacitors. They are even described in the 555 datasheet, I believe.
John