TMI post but advice needed...

So, we have been TTC since November 2016. It hasn’t gone so well lately, but here that last 3-5 days, it’s been somewhat painful to be on top (my favorite position , too!) during sex. To the point that I can’t have an orgasm because I’m so focused on the pain. My cervix is a little lower than normal and incredibly soft too. I’m not entirely sure what’s going on! Has anyone experienced this before? If so, what did you find out and what did you do about it?