There are several ways to check dilation also that don't involve actually feeling your cervix.
I will try and find the links for you, hold on.

But providing your waters have not broken, there is no problem with checking your own dilation at all. In fact, many women prefer to check themselves, rather than have a stranger do it.
Make sure your hands are washed properly, all the way to the elbow, immediately before. Basic rule of thumb is a finger per cm.

Will be back with some other links for you.