What am I feeling? (TMI)

I'm still really lost on what I'm supposed to be feeling when I check my cervix position. I'm like 3 DPO. Yesterday I finally thought I had it figured out. It was very low and firm and seemed closed, not sure what it means but I got that far lol. Now today it's all squishy and I honestly have no idea what I'm feeling for. Read to push like your peeing if it's too high to feel it. I did and I kinda felt something. It felt a little soft but kind of firm. Then I felt really uncomfortable, like achey. What does this mean?