Sometimes i had my menstruation cycle for 28 or 29 day and sometimes i had only 24 day cycle. should i go for full routine check or should i go for only thyroid check. In june my period date was 5 and in july it was 4 July but in July again i had period date is 27 July . actually me and my husband is planning for baby so i just want to know whether it is fertilizer period for me or not actually i am so confused.