Yeah, 2 weeks of doxy is just not enough
4 weeks is ok if it is right after the bite. 6 weeks is better. But if it has been a longer time since the bite, like your DD, different combinations of abx are typically needed.
There are three forms that the bacteria takes on, spirochetal, cell-wall deficient, and cyst. Different abx are needed to treat the different forms.
To add into the treatment difficulties, each person reacts differently to the abx, so one cocktail might work for one person but not the other. Believe me, in my little family of four, we all have been on different protocols (and this being with only two doctors and my LLMD has treated the kids' LLMD!!) to varying degrees of success. It took my LLMD since 2008 to get me on one that is working. Name an abx and I will guarantee one of us has tried it.
ound:
I wish I could help more, except to rec. getting an Igenix test done for Lyme, Bartonella, and Babesia. If she tests positive on any of them, the next step would be to find a Lyme literate dr for treatment.
Again, I apologize for making this sound so gloom and doom. But the upside is that the less time that a person is infected *greatly* improves chances of successful treatment. My fam is a "worst case scenario" in that my DH has mostly likely had this since the 70's, and I have had it for 20 years and my kids were born with it. That is along time for the damage to be done. But in "Lyme Years" your DD has amazing chances of beating this, if she does in fact have Lyme.