pain in all my joints on my right side...

I have been exercising and watching my food now since September... I first noticed significant joint pain in my right shoulder after about the first 5 weeks. went to the doctor, irritated meniscus, got a shot of cortisone. a week or so later, pain in my right knee started and has progressively gotten worse... now noticing right elbow pain too! It is frustrating because it is starting to hinder my exercise quite a bit. not much you can do when your whole right side hurts...

I am calling my doctor today, but I am wondering if anyone else out there has experienced this one sided wonder!?

PS I am 5'1" and 170. I have been working with a personal trainer and I am very aware of my form when I am exercising.