Re: really strange, please read.
Definitely talk to your doctor ASAP. Go to the ER if you can't see your doctor right away. The dozens of lesions on your brain make me think more about Multiple Sclerosis (MS). You may want to talk to your doctor about that possibility. Seizures can be a symptom of MS. It sounds like you may have had a seizure but it also could be a concusion, a stroke, sleep walking or something else. With the type of seizures I had, during the seizure I would often keep doing whatever I was doing before it started but I wouldn't do it very well. For example, if I was eating, I would continue to eat but I might drop the fork or spoon. If you were having a seizure when you got up, your hair probably wouldn't look the way you usually did it, etc. If you got up, got ready for work, and then fell on the dining room floor, it's possible that you were fine until the fall but that you hit the floor hard enough to give yourself a severe enough concussion that you had amnesia. Whatever happened, you should be seen by a doctor ASAP and you should make sure you give him/her all the info you included in your post.