Well, I'm not up on my abx knowledge like I really should be - I have to use the herbal route to heal as abx make me very ill - sorry!! We have several members here that know their stuff though when it comes to abx. I'm sure that they will be along soon.
The cold sensations in your legs and feet, are they turning blue or red? If not, then it's likely nerve sensations - even though they can be quite concerning, once you get into a good treatment for you, it'll stop. I had it too, and after several months of Bartonella & Lyme treatment, it stopped.
Are you detoxing?We have a great post on how to detox when you have these infections - it's 1/2 way down the 2nd post in the "New to Lyme? Start Here!" thread. You will want to ease into all of it - but be sure to do all of the things mentioned. Almost all who use these methods say that they help. Besides, what more would a bunch of cold toes want other than to be surrounded by nice warm water???