Newbie poo issues

This is my second baby and shes a week old and strictly breast fed, my first was on formula due to lack of milk supply...on top of that its been almost 6 years since ive had to change diapers and deal with the usual stuff but my 2nd is full term but preemie sized and shes having some pooping issues and im just a worried mama. Ive tried the bicycle exercise, tummy massage almost everything...but shes still having a hard time pooping. Probably tmi but theyre the typical seedy poop but it seems to be getting stuck at the point im considering taking my stool softeners again and nursing her to try to help her poop. Does anyone have any suggestions for a tired, stressed out mama?