I think you probably have pain in the groin which is usually indicative of a hip problem. This can be easily differentiated from pain in the deeper part of the pelvis by checking for any restriction of rotations in the hip joint. Someone could do this for you lying straight on bed the assistant could rock your leg (rotating it in and out). If this brings on pain there is a possibility of hip joint pain problem. Get in touch with an orthopaedic surgeon for further advice.