I think in the long run you would be happier with a 5" trim. Your hair would look thicker and be less tangly. In about 10 months it would be the same length it is now. But more even.
Especially if you like to wear it down.
If you could find someone you trust, like a realative, or friend, to use good sharp scissors and trim it for you, you could take off 1" once a week. then you can always chicken out, and say "that's enough".
I think your hair is really pretty. And it looks very healthy. A straighter bottom line would definately finish off the beautiful image.
I wouldn't do it all at once though. Hair is so precious to us LHL! We tend to go overboard on the mourning of a few inches.
Valerie
29-33-36 straight, medium brown