How To Treat The Effects Of An Accident?

I had an accident 3 months ago and the shock and trauma caused a lot of nerve and muscle aches. I have been under a lot of stress, I am also a very emotional person. Two cervical vertebraes were herniated and a lot of numbness and tingling on the fingers of the right hand. My neck, shoulder, right arm and scapula were affected I tried physiotherapy but that was too painful as I couldn t even be touched. I started seeing an osteopath who has been helping me, I have slowly started to get better however as soon as I feel stressed or get nervous a bit,the pain comes right back. I feel very tired and down and continuously feel like vomiting yet I don t but the nausea feeling is always there. My mind is continuously thinking and worrying of some sort but this nauseated feeling is starting to concern me. Can you please suggest what I can do and how do I go about finding out what is wrong with me. Thank you!