Severe pelvic pain

Kimberly • 26 years old. Have a 4 year old a 1 and half year old.
I'm 30 weeks pregnant and for the last few weeks I've had such bad pain in my pelvis, walking up stairs, getting dressed and turning over in bed is so painful it's got me close to tears. Has anyone else had this or advice on how to ease it? I'm not seeing my midwife until next week.