Talk to Orthopedic Surgeon on Pain In Right Pelvic Bone

salam doctors.i m 27 year old.i have one daughter whose age is 2 years.during my first pregnancy in 3rd month i got pain in my left pelvic bone.i thought that it is due to pregnancy.i consult my doctor she told me that it z due to pregnancy.but now 2 years has passed but my pain is as it is.specially after any exertion or heavy work i feel severe pain while resting or walking.will u please suggest me any medicine or exercise and also tell me the reason of pain.thank u