Any Advice???

So i've recently been slowely going vegetarian. I've cut out meant and dairy for about 3 weeks now, ( have a little bit of cheese every now and then) but other than that i've been pretty good. I'm not sure f what I need advice on is related to this change in diet or not but i'll throw it out there. For the past few days i've been having this really weird pain that strikes through the right side of my body, like right from my foot to my hip to my arm and then shoulder. And it's as though i can feel it throu my veins. it's a kind of pressure striking pain and it's so bad at times and uncomfortable that i can;t fall back asleep?? any advice on what it could be? Tweet