Physical Signs Of Empathy?

So far in the past 3 months I've had experiences I do not understand. The first one happened to me in April when all of a sudden my necklace, a sterling silver chain, that I've worn for 5 years and was given to me by my ex, felt like it burnt my neck. I immediately ripped off my necklace and I had 2 long red marks on the sides of my neck and it burned all day and night long. When it immediately happened I thought of my ex and called to see if things were ok. I didn't hear from her right away and all day I felt sick to my stomach and just had this awful feeling about her. The only thing that could make my neck feel better was applying anything cold to it.

Later on that night I finally heard from her and when I asked her if all was well, she told me she had a sort of mental breakdown. After I spoke with her I felt so much better and the redness and burning sensation on my neck went away.

A couple weeks later, around 2:30 a.m., I started to have an anxiety attack for no apparent reason. I felt dizzy and couldn't keep one thought in my head. Then I started dry heaving and got so weak I couldn't get off the floor. I hadn't eaten anything out of the ordinary, nothing different. I had no idea what was happening to me. Then all of a sudden I had this horrible feeling about my best friend and called her at 3 a.m., not even thinking she'd be up. Oddly she was up and we talked for a while, she calmed me down and I felt better. The next day she told me that at the same time I started freaking out she was crying and really upset about life, her boyfriend, her job, etc.

I didn't really think too much of it all, just passing it off as coincidences until recently. I just met this girl who I'm crazy about and feels the same about me. We have this connection between us that's so strong already. It started when we hung out all night one night last week and during that time she started to pour her heart out to me. Well when I woke up the next day, I had this weird red rash on my lower right side. I didn't really think too much of it and it went away rather quickly. The next night same scenario; we hung out all night, she poured more of her heart out to me and again I woke up with the same rash, same spot and again it went away.

Well, 3 days later, we once again hung out all night, and this time she really pours her heart out even more so. Again I wake up in the morning with this red welt on my skin which looked like a burn mark and it burned so badly all day long. People thought I had either had a chemical burn or backed into a stove? It even blistered on the bottom. But the next day it was gone and come to find out it was in the same place as her cancer ribbon tattoo and oddly enough it was kind of shaped like that.

Can anyone shed some light on with what's going on with me? Thank you for taking the time to help!