Let me tell you about my swollen vaginal walls

So last cycle I noticed, toward the end, that my vaginal walls were swollen and it was difficult to get past my vaginal opening to check out CM or feel for my cervix. This cycle, same thing. It's CD17 and I don't believe that I've O'd yet (no temp spike, no positive OPK). I have to fight to get around the swollen walls just inside my vaginal opening in order to see what's going on in there. Anyone else have this? I searched but didn't find anything super relevant.