What do people know about or think about the link between concussion and stroke? Has anyone had a stroke or TIA after their concussion? If so what did it feel like and what were the resulting conditions?

I woke in the night one month after my concussion with thunderclap-type headache (like nothing I've had before) and a droopy eyelid. Ever since that night I've had a multitude of symptoms, most prominent of all being seizure-like symptoms at night during sleep time. In the morning I have a hard time opening my eyelids.

(Sorry if this question has been posted before - I'm new and still not sure how to "search" for topics within the forum).