Is back pain normal?

Brittany • Fiancé and I are expecting first child due Jan 8th, 2018!
I'm 7w6d, this is my first pregnancy, the past few days my lower back has been hurting pretty bad. Maybe a little worse than period back aches. I know back pain is normal in pregnancy but is it normal this early? I have my first appointment with an OB on the 30th.