Recently I had flu-like symptoms--a severe headache, pain on my scalp, black spots in front of my eyes. I didn't dare cough because the explosion of pain from the middle of my head to the edge of my scalp was excruciating. I still see black spots in front of my eyes. Is that normal?
I am sorry to hear that you have been going through so much pain and that you still see black dots.
It is possible that you could be suffering from a type of migraine: You can have a Migraine without the headache phase. When that happens, it's called a silent or acephalgic Migraine. If you want to read a bit about that, see Acephalgic or Silent Migraine - The Basics.
It is time to see your doctor and let him know how poorly you are feeling.
This link might help you in the mean time:
Types of Migraines and Headaches