Your cervix should be closed and I don't recommend poking around to find out.
It is said that a never pregnant cervix feels like the tip of your nose, and after being pregnant it feels like pursed lips.
It will feel the same pregnant as non-pregnant so if it is your first baby it will feel like the tip of your nose.
If you have a speculum and have a look at your pregnant cervix it will look more blue than when you are not pregnant due to the increased blood supply.
The above is not true: your cervix is different depending on what part of your cycle you are on. When you are getting ready to ovulate it should be soft, high,open,wet.(SHOW) your cervical mucus changes throughout this process as well. Your cervix will not feel the same pregnant/not pregnant. If you are pregnant it will usually be high and soft and closed. When your period is almost due your cervix will drop down and become firm. If you decide to check your cervix make sure your hands are clean!!!