I was injured playing rugby this weekend when a tackler led with their knee into my lower right back. I had to leave the field and have had substantial pain since, both on my spine where there is a welt, and in the soft tissue of my lower back. I get a burning sensation in my back and down into my butt when I lift my right leg while standing. Is this something I can wait out or should I definitely try to get to a doctor. It's been 2 days since the injury. Thanks!