back/hip pain

I am currently 19w 1d along and have noticed that my hips are hurting more and I have this very intense pain in my lower back, more so on the right side. It hurts the worst when I'm getting out of bed or standing up from sitting in class. I'm in my second week of college and do have to walk about 6-7 blocks every day with a heavy back pack. And up stairs every day so I thought this could be causing it. Opinions? Thoughts? Is it something to be concerned about? Thanks