I have pain in the upper left arm and weakness of legs. Please help.

Hello doctor,

I am a 45-year-old male. When I lie on my left side and raise my left arm, then try to push down on this arm using my right hand, I feel pain in the upper left arm. I am unable to push back. However, when I try the opposite, that is, lying on my right side pushing down on the right arm with the left, I feel no pain and can push down. I had experienced pain and muscle weakness in the left upper arm and lower arm for the past eight years when I was given the swine flu shot. It has only got worse over the years. I have pain in other areas on the left side of the body like in the back and the groin when standing for long periods like at a concert. I have had type 1 diabetes for 22 years. Any ideas? Also, I have suffered from dizzy spells in the past twelve months. This happens when I am awake at night. I then have a feeling like a lot of adrenaline is in my body, my legs are getting weak like I am going to pass out, and a difficulty in breathing. Eventually, it passes.