Perfect baby but my cervix is short!

20 week anatomy scan happened on Friday. Baby is amazing and perfectly healthy which was a huge relief. Emotions then brought back down to earth with the discovery of a short cervix and higher risk of preterm labour as well as a low lying placenta. Have to go back tomorrow for another cervical measurement scan, likely will be closely monitored over the next couple of weeks so a decision can be made about whether I need the cervical cerclage/stitch. Worried of course but still over the moon that my baby is healthy x