Thank you for your reply.
To answer your questions, I am a stay at home mom. I think I injured my SA area, because when I touch that part, there is some achy feeling and sensitivity. Also, it seems to be a little swollen compared to my left side (not sure if it's swollen cause I keep massaging it). For the past 2.6 years I've had two children (29 months and 16 months) and always lifting them in and out of car seat, crib, etc. I did have a very painful small tear on the upper right side of my back during my second pregnancy but it eventually healed. I always have to use my right arm because I am right handed. I tend to drive pushing the steering wheel down alot (bad habit), but now I try not to.