Also bro, let me tell you that I'm guessing your around 137-145, people that size (I'm one of them) depending on their build. But if I remember the video you posted you your sparring match, your a slim build, probably round 5'10-5'11 right?  Bulking to much and doing to much heavy weight makes you loose your key advantage, which is speed! You need to do some heavy weights, but I find that body weight and resistance bands make me faster.  Make sure your doing LOTS of pushups, pullups, and resistance this week, it really makes a difference.  As for everyone else's opinion, I agree a healthy diet is the BEST thing for you. To be honest the leanest athletes use all natural stuff, creatine and extra protein poweders don't do much for you and in alot of instances may be bad for you.  Let me share my two biggest diet tips that I'v discovered and made the most gains with while using them.  1. CUT YOUR SODIUM!  A low sodium diet will make you leaner, and make you feel healthier, reduce water retention (which really just slows you down, its dead weight) AND reduce your chance of high blood pressure and heart disease by 25-30% according to some studies! If you look at anything on a label, look at sodium content, I like to keep every thing I eat under 150 mg of sodium.  and 2.  HIGH fiber content, get good amounts of dietary fiber and it will keep your system purged of toxins that will decrease your energy level, performance and ultimately everything.  

Beyond that I'v been using this thing I read about in a Native American Medicine book, where you heat up your body (sweat lodge) or in modern sense a sauna or hot tub.  Then go and rapidly cool yourself off in a very cold shower, I know it sounds un-pleasant but honestly only the initial shock of the cold water sucks. Supposedly, the high temperature of a fever kills alot of bacteria and whatnot, and then the rapid cooling of your body to a few degrees below normal helps kill some more.  I'm not sure if I can vouch for the science I'm not expert, but since doing it I feel amazing and I haven't gotten sick since then so definitely try it!