It looks to me like your ex might be the father. Have you told him that it is possibly his baby?
dic 9
If you are due on sept 1 and are 26 weeks pregnant then your conception date should have been on dec 9, cause i im 25 weeks pregnant and im due on sept 10 and my conception date was on dec 18
Based on an average 28 day cycle your dates of conception were Dec 5th-Dec 13th.