Hi I Have On And Off Mild Pelvic Pain For

hi i have on and off mild pelvic pain for a month 3-4 days in a week and it only stays for 1 minute until 1 day the pain more severe together with hip pain and it last for 4 hours i can't stand longer because it hurt so much all i need to do is lying down but the next day it just gone.Is there anything to be worried .