IMO you should be phoning the shelter you adopted her from and seeing if there is some type of guarantee that if she wasn't better after meds were done you could bring her back for a check up (free) and more meds. If you are ordering things on line for her then you must have a credit card you could use to pay for more Clavaseptin for her. Could be she just wasn't on it long enough to kick all the crap out of her system.
The things you are ordering on line seem to be homeopathic? Homeopathics take a while to work. You should probably try to get to the shelters vet and see what they will do for you.
Assumptions do nothing but make an ass out of u and me.
We can stick our heads in the sand for only so long before it starts choking us. Face it folks. The pet population is bad ALL OVER THE WORLD!