Cervix

Okay I'm a little embarrassed to ask this but I'm going out of my mind. Okay so I have been feeling my cervix position, but I don't know exactly what I'm looking for. I feel a hard ball like with a slight opening. Is this my cervix?  If so, it hasn't changed firmness. We've been trying for a few months and really started keeping track this past month. 
It's stressing me out and I know that is not a positive thing when ttc. 
Thank you