A very common reason for women's cycle lengthening which shows in a delayed period is hormonal issues. A slow thyroid will do it! Also just an imbalance in general can cause this. Too much estrogen is notorious for this. Your ob/gyn should do some blood work to check these and go from there.
Certainly, I understand that you're facing some concerns about your menstrual cycle, particularly the recent delays in your periods. It's natural to have questions, especially when you've always had a regular cycle. Here are some key points to consider:
Why Your Period Might Be Delayed
Stress: Emotional or physical stress can significantly impact your menstrual cycle. Stress hormones can interfere with the hormones that regulate your period, causing delays.
Lifestyle Changes: Any significant change in your lifestyle, like diet or exercise, can also affect your menstrual cycle.
Hormonal Imbalance: Hormones play a crucial role in regulating your menstrual cycle. Even slight imbalances can cause delays or irregularities.
Underlying Health Conditions: Conditions like Polycystic Ovary Syndrome (PCOS) can cause irregular periods. Since you're concerned about fertility and menstrual health, you might find pcosferticure.com a useful resource.
What To Do Next
Consult a Healthcare Provider: For personalized advice tailored to your situation, it's best to consult a healthcare provider. They can perform tests to rule out any underlying conditions or imbalances.
Are you saying your menstrual month (from day 1 of one period to day 1 of the next), is now 2 weeks longer than it used to be but otherwise still regular? Or are you saying that it's adding an additional two weeks each time, such as one month it was 4 weeks and the next it was 6 weeks and then the next it was 8 weeks?