Pretty much agree with most of what others have said. Few things I would add;
1) Find her kicking range early. Either smother her RIGHT away, or cautiously test her kick range by staying at a good distance, dont let your hands/jabs determine the range. I'd recommend once you find it, sticking right around the outside of it.
2) Practice checking kicks. If you stay at range you might be able to check a kick with her foot(not shin) colliding right into the sharp part of your shin bone. A couple of those can do enough damage at times to slow down the volume of kicks altogether.
3) Close distance quickly into clinches, and carefully pick your shots. As others said, going for single leg/double leg takedowns might not be the best idea, so attempt trips/throws you're comfortable with. A caught kick and trip might be a good way to get top control.
4) Find out what type of fighter she is. If she is pretty cautious and technical, you might want to press her hard relatively early on and smother her with your grappling. If she's wild and reckless with kicks and not very cautious, you may want to do the opposite and play it more careful yourself, letting her wear down a bit the first round or two, and trying for a takedown+submission in the second and third rounds.
5) Fight your game. Despite what any of us said, dont get too out your own fight game. Pick out the things you feel VERY strong with in your mind, and work on exploiting those while trying to hide whatever your weaker of your game may be. There isnt much you can probably improve massively in this short of time, and likely you will do what you normally do when the fight actually takes place, so the biggest thing is just fighting your fight and not fighting hers. If you're that confident in your BJJ, then dont give her much of a chance to use the kicks and flashy moves. Wait for the opportunity, close distance, get on her, and play your BJJ.
Anyway, hope to hear back from you after the fight, and maybe get a video