Slammed the brakes on my truck to avoid an accident yesterday and work up this morning, my neck and shoulders are stiff and a major headache. im home today and possibly tomorrow to rest im a custom home builder, but need a return to work for monday?

Whiplash: Symptoms of whiplash can arise one or more days after a traumatic incident such as yours. Use alternating warm/cold compresses, rest the area, and take antiinflammatories such as naproxen. Do stretches as indicated and avoid lifting heavy things for at least one week. https://www.healthline.com/health/fitness-exercise/upper-back-pain-exercises.