Your priority is quite low hence it wont be eligible for the 50kb free transaction reserve in the block. If we look at the transaction fee, you are paying ~0.00001BTC/kb which is quite low compared to other transactions and there are lots of transactions so your transaction will be at the bottom of the queue. The soft limit of the blocks is 750kb and it will stop filling up with transactions once it reaches that limit if the pool/miner choose not to go past that. They have the rights to reject your transaction to go into their block if they want to. All you can do now is to wait and hopefully a miner would include this into their block. Otherwise, if your client do not rebroadcast the transaction after it gets dropped by the mempool, your coins would appear as unspent and you can spend them again.