That sounds similar to my experience. 3 weeks ago I fell on the ice. Was such a fall that it gave me whiplash
. Feels like my head is too heavy for my neck to support and that it's not attached to my neck proper, as if it's "crooked". I'm being told this is symptom of whiplash and could take several months to heal. Some days it's unbearable and I just cry.
Good luck to you and I hope you get some relief