Tracy, I'm feelin mighty reluctant to make any suggestions, arnica is a common first-aid remedy for sudden traumatic events and is not dependant on your constitutional type ,a homeopath would determine which one you are so it's highly individual. At a guess, you would prolly benefit from either arsenicum 200, or aconitum 200 , I would try the ars. first , 1 pill 3 times a day for a week. These are fairly high doses so you would need to be careful to not antidote the remedies from EMF's like mobile phones, microwave if ya got one, also no peppermint toothpaste. (You can wrap the bottles in foil to protect them though) Best thing to do is call Helios 01892- 536393 and sometimes they give advice on the phone and you can order from them. In times of crisis, the low doses don't seem to have the desired effect so I don't know about the possibility of much relief from a 6x or 30 like they sell at Boots.
The best thing to do in a family feud is refuse to participate if they'll let you, it wreaks havoc on the nervous system, and quite often it doesn't make a darn bit of difference to finding a solution.
Best thing I learned from my Uncle Floyd who is a part time Chinese sage is; Never argue with a fool, passersby may not know the difference.
He got me right where I live on that one!
Hope any of this helps but my homeopathic licence hasn't come in the post yet .