Please help!! Horrible pain on right side of back!

So last night when I went to bed I was in pain all over my body. My back, legs, ankles, wrists, and neck were all hurting but since I was so tired I fell right to sleep. I woke up today because the middle, right side of my back is hurting so badly. I started drinking water and took a warm bath and walk around a bit and while it decreased the pain a bit I do still feel it. Any help or suggestions would be great. If it doesn't go away in a couple of hours I will be calling my doctor. I'm 16 weeks pregnant by the way.