This have happened to me sometimes ago, i had to wait for about two weeks before confirmations,it could due transactions fee or exchange is working on there platform,as for my case it was the platform that was working on it platform.
This has now become the normal for the people who transfers the btc from the block chain wallet and reduce the satoshi to be paid as the network fees. Still their is 63000+ unconfirmed transaction on block chain. It has reduced compared to last week where it was 125000+ and seems by this week end it should still reduce by 70% or so. I had a instance of getting transfer after 2 weeks of long waiting as well.