How can I tell if my cervix is dilated?

I am 35 weeks pregnant and have done some research on self checking your cervix for dilation during the end of pregnancy. I came across this website http://prepforlabor.tripod.com/id14.html and followed the instructions. Before anyone starts freaking out about how unsafe it is, please understand I made sure to thoroughly wash my hands and nails and was very gentle when I checked. If a penis can go in there during intercourse, I think 2 little fingers are just fine.

So after finding my cervix, I discovered the “hole” was open to about the size of my finger. Does this mean I am indeed dilated? I didn’t try to push my finger in. Even though some sites said it was okay to do, I don’t want to run the risk of infection or rupturing anything before it’s time. I’m just curious as to whether that hole means anything. Before I was pregnant my cervix only had a small slit type opening to it. So this is definitely different. Anyone try to check themselves during their pregnancy? What did you discover?