Average cycle length

Okay so I found a new issue today for me :/ I got my birth control implant in February, so my period has been crazy and very close together. So I needed to find a more accurate number for my cycle length. Mine went from 33 to 14. So when I went to change it, the numbers only go from 22-90. Which doesn't fit me...so now my prediction calendar will be off which is a bit frustrating. Is there anyway this can be changed?