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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

You may have a yeast infection. Pain, swelling, a bad odor, and a white discharge, are all signs of this problem. Yeast infections can be caused by several factors, such as a weak immune system, antibiotics, or wearing tight clothes. To treat this, you can do it through over-the-counter antifungal cream or pills. As for hygiene, maintaining the dryness of the area and adding cotton underwear can also assist in that.

It's unlikely that your fiance is pregnant Birth control pills alter hormone levels, which can cause lighter periods. However, if you're still concerned, take a PREGNANCY test or consult a doctor Remember, birth control pills are not 100% effective at preventing pregnancy, so it's important to use additional PROTECTION if you're not ready to conceive. 

Missing a period without having engaged in sexual intercourse requires an accurate gynecologist’s evaluation. Often, hormonal imbalances or thyroid disorders lead to irregular menstrual cycles. A gynecologist can determine the cause of abnormality and prescribe proper treatment.

There could be a delay in menstrual cycle because of many reasons like stress, hormonal problems and some medical conditions. Nevertheless, you had no protection thus pregnancy is always a possibility for you. A pregnancy test and a visit to the gynecologist will be necessary for proper evaluation. They help you in knowing what to do and also give medical advice.
 

Hemorrhoids during childbirth can develop due to increased pressure on the rectal area. Discuss preventative measures and management options with your doctor