How many 6max tables can you guys do at once? Two tables is a breeze for me, but at 3 tables I completely lose it and play teh suck and get a headache etc. Is there also any reason someone can think of why it's so hard for me to go from 2 tables to 3? I'd really like to slowly move up to 3-4 tables but I can't even bring myself to it anymore since it always wrecks me so much..