Good Morning K.,
Having trouble at night for most kids begins to happen when they start to understand more of what they see in the world around them. Each of my children suffered with this. For some, it was that they came to fully understand something as simple as a Disney movie, so we stopped allowing that child to watch movies of that nature. For instance, one son came to the realization that things die (he had a frog that died at one point). I began screening his movies and would not let him watch something unless he fully understood that there was going to be a death and then I held him as he watched it. His problem spanned from feature length movies to simple cartoons. I used to think that mothers never slept.
If your child comes running, it is not always because they lack the ability to be strong, but more because they need to have that human connection and to know that someone is there to face things with them. I tried to make it a balance. I would tell my kids that they could always come and get me if they needed me. Then if I thought they could brave it on their own, I led them back to bed (using words that I hope gave them strength), I prayed with them, and then I let it go.
If they just seemed to need a bit of comfort, I would hold them for about an hour and put them back to bed and then sometimes, if they seemed to hurt badly (which 5 year olds sometimes will), I allowed them to sleep with me through the night.
However, I have one child, who is fearless in every other aspect of his life. He is independent on all fronts and still at the age of 9, he wakes up in the middle the night screaming. He refuses to come and lie down with DH and I, since this all began when he was 5. He wants us to let him handle it on his own. Sometimes we just cannot, he is too emotional. We took him for a physical about 3 years back and found out that a lot of his problem had to do with his inability to breath through his nose. Since, we have noticed that he is worse when he is congested. He had surgery, was ok for a while and has developed asthma and bad allergies so the night terrors started up again.
The point I am trying to make is that finding a balance between empowering her and comforting her is the best thing for her, but if the problem persists after age 6, then take her to the doctor to see if there is not something else going on.
I can tell you this. I was so grateful that I held my children (even the one that fought me). We are so connected. But especially the one that fought me, because the problem was outside of his control. My grandmother used to say, "You only have so many opportunities to hold your kids before they grow up. Take advantage of every opportunity you get."
I wish you the best.
R.