I have sent BTC yesterday but one day passed it is not confirmed, I have raised mining fee, this sucks.
Maybe it happened because of some modifications, and problems are only normal to be encountered since Bitcoin is an open source, I think. And at this moment, it is now working well. It won't die easily, now that it's demand increased and its community is now larger. Also its price pumped a lot since the modifications or fork that happened. Let's just hope that these kinds of problems will be fixed immediately as possible.