Fell down the stairs last night and landed on my head (tile floor), little cut on goose egg. real tired, bad headache, a bit lightheaded. concussion?

Yes: You have symptoms of a concussion. If things get worse go to the ER

Head injury: Probably not concussion if no loss of consciousness and/or amnesia, but head injury nonetheless, and now post-traumatic issues. In view of your history, would strongly urge updated MRI or CAT imaging to rule out intracranial bleeding (prior lobectomy). Call your doctor.