Hi,

With the tiny information you gave I can tell that:
* The network is very busy. The mempool (not yet processed transactions) is 37 MB instead of the usual / nice 2-8 MB.
* There's a high chance the tx fee you paid is small, much smaller than the currently recommended 100 satoshi / byte.

I recommend Electrum, where I know for sure that you can adjust the fee by hand before sending.

Edit: if you send the tx ID I can see how small your fee was. I look here to see how busy the network is and what fee I should use.
Edit2: another recommended wallet is the Bitcoin QT, where afaik you can have all the control you need (even re-send the transaction with higher fee), but I don't use that one.