i hit my head yesterday on the gooseneck of our horse trailer. i hit it kinda hard but i didn't get dizzy or pass out. i woke up this morning at 5 am with a killer headache but it is the opposite side of where i hit my head yesterday. i took some advil but when i woke up 4 hours later it hadn't really touched the headache at all. i am exhausted today unsure if it was the knock to the head or just being tired from the horse show yesterday. thoughts?