Fasting is one of the recommended treatments for spike protein damage.
Headaches can be a symptom of serious problems, or they can be nothing to worry about. But they are unpleasant either way. And yours hasn't resolved over time, so that is a little alarming.
Low dose ASA ("Aspirin") is helpful against blood clots because it prevents the blood from getting too thick. You can take small daily tablets of 81mg if you think that might help. Even if you don't want to take it regularly, it's good to have some in your medicine cabinet, just in case you need it. It's also important to take a couple of them right away if a heart attack or stroke is suspected, as it can save your life, or improve your outcome (it can mean the difference of being able to speak afterward, or not).
Hopefully as more research is done, people like you and I get answers!