Hamstring and upper back pain

Charis • My name is Charis. Im 32yo. Ive been married for 3.5 years and we have two boys. I have had three miscarriages but im currently 30 weeks pregnant. My due date is August 31 2016.
Has anyone else been having hamstring and upper back pain. Today was miserable for me at work today. I guess i need to start stretching more.😒😒