You should know that the Amox won't be effective for any of these infections without the addition of the abx Probenecid. It keeps the Amox in the blood stream long enough for it to be effective against these infections.
The Doxy needs to be at least 400 mgs a day in divided doses - 600 mgs isn't too much either though.
A little over 2 months isn't too far, depending on how long you've had these infections, and if you have Morgellons as well, that complicates things too.
Are you detoxing lots? It's so incredibly important for us to detox as much as we can. Here is a link that I've come to really like that lists a lot of the more effective detoxing (by patient voting) that those of us with these infections use:
http://www.tiredoflyme.com/detox-methods.html in case you need some more ideas.