How to get faster in 15 days?

Well, i am 14 years old, and i have a very important meet coming up for my club team. high school season just ended last week, and the meet is coming up in 15 days. Anyways, top 6 people final per event, and for some reason, i am just coming short in some events. My current times are: (in SCY) 50 free-26.82, and i will need to go a 26.23 to final (last time i did this event was about a week before christmas, so i assume i should go faster this time because i plan on being well tapered and alot stronger.) 100 free- 59.83, and i will need to go a 57.66 to final (Okay, for this event, what should i do? I have never really "sprinted" a full 100. i go at around 95% because if i go all out on the first 50, i am practically dead for the second one. Should i try to go all out on this race, or just play it safe?) 100 ***- 1:14.75 (I will need to go around a 1:13 to final. I'm pretty sure i will be able to make this time, because, again, last time i did this was before christmas.) I will plan on wearing a FSII legskin for my free events and a FSI Brief for my ***. My current plan is to go all out at practice for the remainder of this week and all of next week, then taper the week after that, and the meet is friday - sunday. I will plan on lifting weights this week and next week to become stronger for the meet. I practice about 3.5 hours daily, by going to two practices, but the week before the meet, i will only be in for maximum of two hours. So, my question to you is, what will i need to work on for each event to go this faster than ever before in 15 days? Any comments on my taper schedule? Anything to add? Thanks again :)