Its very important to screen the lumbar spine before treating the SI joint. There may be some adaptations there which may need to be seen. If there are positive findings there, that has to be taken care of before treating the SI. from your posture it appears you are standing in a FRS(RT) position. That is your facets appear to be locked into flexion with right side bend & right rotation. Here your internal obliques on right would be over working & obviously your externals on right will not contract. You probably have a multisegmental affection. Whether there is a neutral dysfunction also can be judged only with an intensive assessment of the lumbar spine. Check if you have a physio anywhere close by who is trained in doing manual therapy using muscle energy techniques. You will have to be tackled into all the movement planes. Once you are unlocked, you will have a whole lot of exercises to keep you from going back to the dysfunction, as you would be contracted on one side & stretched on the other, giving you stretch weakness on one side & tight structures on the other.Good luck.