Lower back & tail-bone pain?

mary • 07•01•16 💍 Teacher 👩🏻‍🏫 11•18•20 🎀

Hey ladies. I am currently 18 weeks along and for the past week or so I’ve been having serious lower back and tail-bone pain when I walk or stand for too long and if I lay on my back for longer than 10 minutes. I’ve read that sleeping with a pillow between the knees and laying on the left side helps relieve some of the pain, but do you have any tips? #Desperate 🙃😂