I'll offer my advice as i work in the industry.
Take full photos of her vehicle first of all. Seems a possibility that she did both sets of damage to me, hit the rear, moved her vehicle away from the car so no scraping down the side, but not in time to miss the mirror. Seems reasonable.
Regarding your vehicle, if the cost of the repairs are more than the market value then it will be a write off. When you get the engineer's report with a value, the engineer will also give you a salvage value.
If the car is safe to go back on the road, you'll be able to have your salvage deducted from your vehicle value, you keep the remaining money and the vehicle. Alternatively you scrap the vehicle and keep the full value.
If you make a claim on your policy and your insurers recover all their money from the other driver's insurers, your policy will be reverted back to how it was before the accident. Unfortunately a recent trend seems to be appearing where premium goes up regardless of fault. The fact that you've been involved in an accident is seen as a risk and thus your premium rises!
hope that helps