To calculate your estimated due date, add 280 days (40 weeks) to the first day of your last menstrual period. In this case, if your last period started on September 23, 2018, your estimated due date would be June 30,
To determine how many months pregnant you are currently, count the number of full weeks that have passed since the start of your last period and divide it by four. As an example, if you are at week 32 since September 23rd, you would be approximately eight months pregnant.
However, it's important to note that these calculations provide estimates and individual pregnancies may vary. It is always best to consult with a healthcare professional for accurate information regarding your specific pregnancy timeline.