Has anyone had whiplash from a car accident?

I was rear ended in December 2024. By two vehicles.
At the time I didn't feel any pain but two days later, pretty acute neck pain ensued. It was daily, and into the shoulder area too. I went to a chiropractor to get treatment, and it did help. But fast forward eight months, and I still get pains every couple days.
I guess it says online if whiplash lasts longer than six months it's referred to as chronic whiplash.
Anyone experience this longer than six months?