What are the dangers of falling backwards, head first for an adault of 38 years old?

hello friends,

yesterday morning i, a 38 year old female, while in a sitting position, fell off the tip of the bed backwards on our hardwood floors, thereby landing head first with the rest of my body following!  i do suffer from a chronic back pain which is caused by arthiritis and have pinched nerves on back of my neck, and need to take hydroprofin, regularly for pain.  i wasnt in a lot of pain at first due to the hydroprofin taken an hour before the fall....but today i feel a mild headache on top of my head, temples and of course i can feel sore pain on my shoulders and my arms, but i can still walk without any numbness or any difficulty on my legs, and i am not running any fever.  i am a little worried though, just because i have heard of people who have taken falls and havent felt any discomfort or anything, but have eventually gone to the emergency and some have died in a couple of days from some type of bloodrush trauma to the head.  i am just curious if anyone has taken the same kind of fall that i took without any complications arousing days later from the fall?  (dont want to go to the hospital for financial reasons) but would like to know what type of symptoms should i expect from my fall, that i dont have to worry about, and what symptoms are to cause an alarm? which part of the head is it more dangerous to fall on?  i hope to recieve some answers to these questions, so that i can stop worrying.