During last trimester of pregnancy there releases a hormone called relaxin in relatively high levels.The purpose of relaxin is to loosen the ligaments in your pelvis so the joints can separate slightly. This allows flexibility in the pelvis for baby’s head to pass through during birth.The weight of your baby added to the effects of relaxin on your pelvic floor tends to cause those muscles to stretch and weaken, all of which contribute to feeling pelvic pressure during late pregnancy. if,you feel problems are not severe or you can manage them then you should follow follow following precautions. Lying on your left side to encourage your baby to adjust position Sitting with your feet elevated to improve circulation Resting with your hips elevated on cushions Warm baths Pelvic massage from a pregnancy trained practitioner Wearing a pregnancy belt can help support the pelvis Heat packs Knee lifts to relieve stretching ligaments Pelvic rocking or swaying Hip squeeze exercises Acupuncture Sex can relieve the pressure caused by vaginal swelling Body therapy such as osteopathy or chiropractic (make sure the practitioner is trained for pregnancy) Gentle exercise such as swimming, water exercises, cycling or walking Pregnancy yoga Pelvic floor exercises to strengthen the muscles and support the area. if problems are unbearable then consult to doctor personally for better management.