in need of advice

taylor

so in the first picture , the days circled in black are the ones we bd on when he didn’t pull out. i suffered a miscarriage the beginning of december,

from the miscarriage in december into my january period was 28 days. the period at the end of the month was another 28 days also. my question is, how come my next cycle i go into my fertile window sooner then later unlike my november cycle ?