Cervix cd22?

Lauren • 31, partner is 35. We have three children, William 10, Georgia 2 & Eliza just born. I work with domestic abuse victims in the north east of England. Partner is a roofer/joiner.
Anyone check their cervix daily? I hVe just started doing it on & off to be honest. Where should it be on cd 22 if you have a 29 day cycle ? Mine at the minute is high, verrrrryy high. Medium and open in my opinion. What does this mean? If anyone has any stories about theirs before menstruation or before bfp that would be good. I've read loads on the net but can never seem to get a straight answer lol