I would start on the doxy straight away and then maybe try to add metronidazole.
Starting with doxy would also palliate any detox reaction. The protocol is basically what zak posted earlier. Horowitz is a member of that association. There are several options and the most practical is to do doxy, metro and perhaps finish with some amoxicillin or azythromicin. If I were you, I would say that you have an intolerance to fluoroquinolones (ciprofloxacin, levofloxacin, etc). In my experience, people of Caucasian descent fare much worse with fluoroquinolones.
The protocol includes plaquenil which makes the doxy work better. It is a drug used in malaria and rheumatoid arthritis. If you take alternative support, I think that could be obviated.
Remember to take doxy with a tall glass of water, without any dairy, don't get exposed to the sun or you'll get a rash. Don't lay down after taking doxy either.
Treatment success sometimes depends on antibiotic tolerance. You have to rest. Stressful activities would likely make you nauseated. Make sure you tolerate the probiotics as well.
Should you take metronidazol, make sure to take a good complex B vitamins.