Soy isoflavone extracts and supplements are available as dietary supplements without a prescription in the US. These products are not standardized, and the amounts of soy isoflavones they provide may vary considerably.
This can sometimes be caused by allergies, infections, and even tumors, but it is often simply something that some people have due to their anatomy (ie, they were born with a pre-disposition to this problem). Sometimes, this clogged feeling in the ear can be a trigger for headaches. As you know, headaches can come on from almost any cause, and some people will have different things that are triggers for these headaches to start. Continued ear pain, hearing loss, and dizziness would all be potentially worrisome symptoms.
A headache and fever may be a sign of an infection that is localized to your brain and/or spinal cord, which forms your central nervous system. Examples include: meningitis, encephalitis, or a brain abscess. Systemic or whole body infections, such as the flu or early HIV symptoms, may also cause a headache and fever. This all being said, sometimes a headache and fever is a sign of a viral infection that needs to run its course. It can be hard to distinguish, though, so be sure to get it checked out.