Two weeks is kinda short to play that kind of stuff . You must be very advanced.
I'm not that advanced, I started to study this on January and had already played it in public, but a little bit slower. I just wanted to gain more speed... I'll try quantum's tip!
For the Chopin the ideal speed for my taste is actually the 120 marked on the score. If you can manage it at that, no need to change, IMO. Just take care of rendering that suggestion of horse-gallop by a properly regular beat and putting the accent on the right places.The Scriabin can work well with a slower tempo as well. Prioritize clarity and power rather than speed. It might be dangerous to force a speed-up in a short delay like this.