Don't take this as a criticism, but "all the resources [you've] loaned", even at the high estimate of 12.9Mh/s, comes out to less than 1/10,000 of a percent of the total shares input to the current pool hashrate, which is currently clocking over 1.3 Terrahashes/sec.

And the last 24 hours has been a GOOD pool day, that's about twice the payout (since we've found twice as many blocks) that you would normally expect to see in a statistically average day.  As OrganOfCorti said, if you're mining on GPU or CPU, the current difficulty and mining rate of the global BTC pool is so much larger than your capacity to mine on that hardware that it's not efficient.