Back Pain!

Ashley • I'm 26 years old and have a 4 year old son named Keegan, with my husband Todd. We are expecting baby #2 on March 18, 16.
I have had horrible back pain since I was about 16 weeks pregnant. This is my 2nd pregnancy and I have never had this issue. But it's hard for me to get up and walk for a long period of time. Any suggestions?