unbearable pelvic pain and 1.5 cm dialated at 35 weeks

Pooja • Baby boy born on march 7th 2016.He is gonna be a big brother soon.. expecting second baby on april 2018

During my last cervical check doc said I am already 1.5 cm. i know some women can be dialated to some cm for weeks before delivery but for me its like baby is sitting on my pelvic/pubic bone and its hurting sooooooo bad. i am not able to walk or even turn from one side to another while laying on bed. i have difficulty to lift my left leg from floor to bed actually. Is this normal pain or should i get checked. i was wondering if baby is dropped more into birthing position and i am dialating more.. i sometimes feel contractions but its more like strong back pain and pelvic pain together and not regular..can anyone relate this situation? any advise is appreciated. Thanks.