I only transitioned for 6.5 months before I BCed. At 18 months I bet you have a lot of hair under your relaxer. I have plenty of pics in my album with styling ideas. One thing to remember is that your length could be there, but you might not be able to really see it because of shrinkage in other words you might still look like you have 2in of hair when you really have six. This is all good though, I've seen some sistas roc a mean little fro. Again you do have several styling options.
If you want to cut it then cut it...what do you have to lose??? Let your creativity shine!