How do you check your cervix?

Kerrilee • Im a mum to 2 beautiful children my daughter who is 6 and my son who is 4 in august. i was born in London but have lived in bristol for 7 years .
Hi all ttc baby 3 and have been told about checking your cervix. Well how to do this as I think I must have a high cervix as I can not feel what I'm ment to be looking for? Iv tried sitting on the toilet or one leg on the bath etc just don't know what I'm ment to be looking for Tia