Tilted uterus/Back pain

An ultrasound tech told me a long time ago I have a uterus that is tilted all the way back, and since I've been pregnant I've had a lot of dull achy ness in my lower back and especially my tailbone region. Anyone else experiencing pain in the tailbone region or have a tilted uterus? I'm 16 wks and feel like my butt Is broken!