Hi, E.!
I am also a SAHM. I am six and a half months pregnant, have a twelve month old son and a nine year old daughter that I homeschool. I also love my husband, and I also love Jesus! ; ) Oh, and I'm also a doula.
I nursed my duaghter until she was eighteen months and my son until he weaned himself at eleven months, so I have definitely dealt with teeth and I feel your pain!
I have found that when teeth hurt, it's usually because baby is either teething or being "lazy" (if I could use that term loosely)... chances are, she's not latching on properly. My daughter did this, and I, out of desperation for her to relax/sleep, allowed her to do so "for sanity's sake." I found myself in so much pain from that! With my son, I decided that I would be more stubborn than he was to "do it properly." If he didn't latch on properly, I would separate him from the breast, using a finger in his mouth (I'm assuming you know how to do this) and would start all over again. I had a few times when he became annoyed and sometimes just downright angry, but I insisted on him doing it right... he eventually gave in so that he could nurse, and I was NEVER SORE!! = )
You may also want to visit a La Leche League meeting in your area to check your latch and get some extra pointers and encouragement!!
I hope this helps!! God bless you, sweetie!
In His Strength & Love,
C. <><