Hi,
Welcome to icliniq.com.
I feel the culprit here is your weight. At this young age of 28 years, you BMI (body mass index) is in obesity range.
Increase in body fat especially in the mid-segment of the body, around waist, thighs and breasts is not a healthy sign. This fat gets converted to estrogen, the female hormone, thus causing a very high level interfering with the normal hormonal control. You would have seen fat male developing breast is due to the same female hormone. When estrogen is out of control, the brain loses control of hormones from ovaries. Then, ovulation will not occur on time, that is around day 13 or 14 of periods. Later, the second hormone progesterone will not get released and so periods do not occur. All these years you have been gradually putting on weight and the periods you had were due to the hormone in the birth control pills, same estrogen and progesterone pills. Now, when you stopped the birth control pills, your body is not able to continue the cyclical production. It will not allow you to have next pregnancy too as ovulation is needed for pregnancy.
You are 5 feet, and your expected weight is 115 to 125 lbs. It is easy to say, but tough to lose 40 lbs, but with strong willpower, you can do it. Have food with low calories, high proteins and lots of vegetables and fruits. Avoid junk food and red meat. Reduce oily food. Also start regular aerobics, brisk walking, regular exercises and yoga. Try to lose only 2 to 4 kg per month. Never do it fast, It is tough to maintain if done fast. Even a loss of 10 lbs will start showing changes in your hormones and your periods will be back to normal. Your pregnancy chance will improve, and abortion rates (due to hormonal imbalance) will reduce. As you lose weight, you will also lose the black or brownish discoloration in the back of the neck, inner aspect of the thigh and under surface of the breast. Hair fall, abnormal hair growth over the body, acne over the face, a dark shade over lower half of face, the oily skin over nose will reduce. Overall you will feel better. For completion, have thyroid profile and serum prolactin done in the early morning and an empty stomach. Do not worry about periods. They will indirectly get back to the track.