im no expert but know that for most of the pregnancy the cervix lies towards the back of the vagina, behind the baby's head. This is called a 'posterior cervix' and is often hard to reach by your OB if they are performing a vaginal examination. Near the time of labour and / or during prelabour and early labour, the cervix starts to move towards the front of the baby's head. This is known as either a 'central' or 'anterior cervix' (depending on how far forward it has moved), and can usually be easily felt by your OB if being examined.
So its good news