Summerfruit poor poor you, sounds like you've really been through it, what a horrible way to end your pregnancy. I had bad toothache, but not bad as yours, just after ds2 was born a few weeks ago. I took a bit more paracetamol than was meant to and in the night when we'd run out and was desparate for some sleep took some nurofen too. Not sure how bad it is when breastfeeding but I haven't worried about it too much.
Sounds like you are going to be fixed very soon and it will feel like such a relief. Then make sure that you do nothing but catch up on your sleep!!