There can be multiple reasons of erectile dysfunctions. Since you mentioned you have fever and also feel weakness or lathargic, then there could be blood related issues. I would advise you to get complete blood count can also consult a general physician about your condition. There should be some under lyme disease which is causing your erectile dysfunction. Continue your Ayurvedic medication for erectile dysfunction but also consult and allopathic doctor. Also are you under any kind of medication for blood pressure of cardiac problems if so then they could be one of the causes for your erectile dysfunction.