You are making sense, to the extent that your post clearly demonstrates intact cognitive function, and that is good news.

My late grandfather suffered a concussion during WWII and he had lifelong consequences.

Men are to some degree interchangeable. Brains are not. It is not too difficult to get another bf, but you cannot get another brain. Sure, you are invested in your r/s after all those years, etc., but still, relationships are optional - you do not have to be in one. Health is not optional. So you should be solely worried about treating the concussion, going to the ER if necessary as Leed advised, and not at all concerned with who is to blame. You can think about theoretical issues later, after you exit your current health crisis successfully. You should be in crisis mode now and only attend to issues that are on fire.