Cervical position and feel new question

Regarding the new question on the <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> about your cervical position and feel. How do you check this?  I have vaginismus so just inserting my fingers can be pretty painful sometimes, but the times I have done it I never am able to reach te back of my vagina in order to touch the cervix.