Why is my period 4 days late with cramps?

Many factors impact the chances of your pregnancy and  PCOD is one of them. But it does not mean that you cannot get pregnant if you have PCOD. I advise you to please consult a gynecologist for your issue. Based on proper evaluation and your individual condition, the doctor will suggest some treatments that can help increase the chances of your pregnancy.  

When spotting during your ovulation, this is usually not a matter of concern. But if the bleeding does not stop or worsen, or you feel pain and discomfort then it is recommended to visit your gynecologist. They will be able to diagnose and treat if needed.

Sexual activities while menstruating normally minimize the chances of expectant mothers since probable ovulation is ruled out. Furthermore, chances are lowered by withdrawal before ejaculation. In the instance you also take emergency birth control pills such as Unwanted 72, chances are further minimized. All the same, there is still a small risk of getting pregnant. If one does not menstruate as expected or develops unusual symptoms, best to go for a pregnancy test. 

If you miss a period for more than 3 days, it may be implantation bleeding as well as a medical condition. A gynecologist should be consulted for a thorough examination and diagnosis. The gynecologist or an obstetrician is the best consultant on such conditions.
 

Having some variation in cycle length from month to month is pretty normal, and it's also normal for cycles to range between 21 to 35 days. In your case having cycle lengths of 23 days and 28 days is within the normal range.. And pain and cramps during a 28-day cycle is quite normal which almost all women go through. If its really unbearable you can condult your doctor

The surgeon can remove the cyst, and you will feel better afterward. These cysts are like fluid-filled balloons on your ovary. They can cause pain, bloating, and changes in your periods. Doctors can remove the cyst without taking out the ovary. The surgery is usually effective and helps relieve the symptoms.

If your beta hCG levels are low after 14 days of confirming you’re pregnant or after missing your period, this could be a problem. Some signs might be spotting, cramping, or not feeling as pregnant (sore breasts). An ectopic pregnancy or early miscarriage could cause the level of hCG to drop too much. Make sure to see your doctor again so they can check and tell you what next steps need to be taken.