N.L.
I had the same issue with my now 7 year old daughter and I really let it stress me out. I found that it became a battle of wills - or a control issue. I found that focusing on the fact that there was no way she would be in college still wearing diapers - HA (This image worked for me, what can I say?) - I was able to let go of some of the control. Sure enough, she was not only potty trained before she turned 3 1/2, but was able to go through the night without even a pull-up, and through most days with only a rare accident. In the end it was worth the wait and worth deciding to be patient. We ended up being in a better place than most of my friends even though she trained late, she was completely trained :) Good Luck!