Conversation: The conversation between human and AI assistant.
[|Human|] My period has been very regular for the last year, and was very heavy until November when it was shorter and lighter than normal. It is now approx 20 days late. Home pregnancy test came back negative, and I have not started/changed/stopped a hormone based birth control. I regularly feel fatigued, no matter how much I sleep. I have been experiencing cramps and mood swings. Bowel movements have increased and are often looser, but then days of constipation. I struggle to concentrate either at work or reading/watching a movie etc. I tend to be a lot more thirsty than usual. I started exercising more frequently about eight weeks ago, gradually building up to running 3 miles a couple of times a week. I m 24 years old, 5 3, about 135lbs.
[|AI|]  Hello dear, I understand your concern. In my opinion there are various causes for delayed period other than pregnancy. They are hormonal abnormalities like thyroid abnormalities, polycystic ovarian disease(POD), overweight,obesity, stress, anemia etc. As per your history I would suggest you to rule out the above abnormalities by getting done the necessary investigations like thyroid profile, ultrasound and He. Thyroid profile rules out the thyroid problems, ultrasound for POD and He to rule out anemia. I would like you to see the doctor as you might need medicines for with Chat Doctor. Avoid stress if any and weight reduction is helpful in case of you are overweight or obesity. Nothing to worry. Cycles become regular once the cause is treated. Hope this helps. Best regards...