Braxton Hicks - preterm labor assessment

Hey mamas,

I am 31 weeks tomorrow, and have been having lower back pain/cramping since 28 weeks. Last week I had a ton of Braxton Hicks so my dr had me go get a preterm labor assessment. I am not dilated, but my cervix is already 50% effaced (thinned out). They also said baby boy is head down at a -3 station, which I think is pretty low for this early? I seem to be having a lot of Braxton Hicks still and am very nervous about having him prematurely. This is my first baby and just looking for any advice or anyone who has gone through something similar!