has this happened to anyone else at 8 weeks?!

I'm 8 weeks + 1 day and I've been having lower back pain always on my left side it seems. It comes and goes and sometimes is tolerable and other times it gets so bad it hurts to even walk. I had a mc my last pregnancy so I'm constantly worried it's something abnormal. I don't have an appointment until March 2 for my first ultra sound either ... Has anyone else experienced back pain similar to mine?