Should i go in??

I had my baby Dr's appointment on monday she told me im 2cm dilated and 60 % effaced im 31 weeks 4 days FTM and i been having really bad back pain all day and a little bit of cramping here n there nothin i cant handle tho.. (maybe tmi )but now im geting shooting pain in my VA Jajah..(( i have had the shots to speed up the development of my babys lungs already at 26 weeks)).... it doesn't help if i change positions its still there...my baby is still moving (like going crazy it feels like) and it hurts.... i just dont know if I should go in or not..