The difficulty right now for ETH is huge, go to etherscan and look at their difficulty chart they have posted. Right now it's 3000Th/s so your 44th is only around 1% of the actual block difficulty. So maybe after 99 more tries you would hit a block.

So this is why you need to use a pool because the variance is just too high to solo mine right now. If you still insist on solo mining to save on fees then just mine ETC which has a much smaller difficulty and you aren't wasting your time.