Hi Carmen —
That’s a tough call(!) —
Here are some thoughts —
1) I think the simplest and easiest gauge to use is whether or not you feel you have a chance to get a score that you would be happy with. If you think there is a chance of that, go for it. If you don’t see a way that can happen, I’d lean toward postponing.
2) In terms of being as prepared as you can be, try these simple tests —
For LR, try to list, off the top of your head, as many of the different types of q’s you are likely to see as you can, and see if you have a clear sense of what strategies you ought to use for these q’s.
For LG, try to list, again off the top of your head, all the major things that can happen in a game, and how you might diagram those things.
For RC, just try to gauge for yourself whether you’ve habitualized a reading strategy that you are comfortable with and that you’ve become consistent with — that is, you know what you want to look for/think about as you read LSAT passages, and you’ve practiced doing this enough so that it has become fairly consistent and natural.
All of the above gauge how well you’ve been able to internalize all that you’ve learned and how well you’ve been able to turn your practice into habits. If you have a lot of trouble with the above, it could be a sign that more practice can raise your score higher.
Again, I realize that’s a tough decision on your end, but I hope those suggestions give you even more food for thought —