Carol and Kevin's suggestions are both good, but may not be enough, particularly if the sacroiliac and lumbar facet joints are restricted, as seems likely to be the case here. You should be examined by a chiropractic physician. There is one at the Back in Motion Chiropractic Centre, at:
14G Jalan pjs10/2
Petaling Jaya Selangor Darul Ehsan 46000
I don't know where this is in relation to you, but, again, I would strongly suggest checking in with Dr. Kluner there or another chiropractic physician. These sorts of things rarely sort themselves out with soft tissue techniques alone.