Neck and Arm Pain

I was involved in a minor car crash a few months back and a few weeks after began to develop severe pain in the left shoulder and left arm. Since the onset, I have not slept through the night without waking up in agony at least 2-3 times. I have seen two GPs and one physio. The first GP referred me on to a physio and advised I had strained my left trapezoid (sp?). The physio confirmed the same and recommended some exercises.

These have not helped at all and if anything, the pain is much worse. I thus saw a second GP who advised I had tendinitis and recommended taking ibuprofen 3-4 times a day, swimming and some other exercises. Again, the pain simply will not subside and I am skeptical that ibuprofen is not working at night. I don't know whether I am just being impatient but I am not seeing any results and it is very frustrating. I can claim some free health benefits through work, such as a chiropractor, a physio or acupuncture work. Would these be advisable and if so which?