5 weeks and right side flank pain - any experience?

Hi ladies, really struggling with ongoing back ache and pain and can’t remember at all if this is common, as previous pregnancy was years ago!

The pain and ache is in my right side on my bank in the flank area, so slightly above tailbone. Walking around and stretches sometimes helps but can’t seem to shift it.

Is this just hormones or something more serious? 5 weeks seems early to me but I’ve always suffered with sciatica and back problems, so not sure if pregnancy is just exacerbating it??

I’m a very nervous (crazy googler) pregnant woman at the moment, so reassurance would be much appreciated x