Hi,
Welcome to icliniq.com.
Let me start by assuring you that these are normal features. You are normal from the history you have mentioned. For a young lady, cancer is not possible, unless you have a strong family history of cancer. During periods, the follicles keep on growing slowly, along with them, the endometrium or inner lining of the uterus also thickens. Then around 12th to 16th day of periods, ovulation occurs and the egg is pushed into the tube.
The remains of the follicle, which is called corpus luteum, it is the source of progesterone hormone, which further keeps the endometrium thick and spongy for a possible pregnancy. If no pregnancy, this comes out in the form of blood, bright or slightly dark red blood, for around seven days.Then it stops as the next cycle's follicles get ready. Now in your condition, all these are due to some hormone imbalance. It can be caused by your weight.
The fat deposits are converted into estrogen hormone. So, the balance is disturbed, follicles do not grow on time, and the endometrium does not grow up to the mark. Ovulation may or may not occur, after ovulation, the corpus luteum is not well formed, so due to poor support, it may keep on bleeding for long or as fleshy masses or clots with or without pain, and the secretions following periods will have a blood tinge seen as the pink color. Your expected weight is 115 to 125 lbs. Once you reduce weight to normal range, you would not need any medicine to get periods or to get pregnant, and the pregnancy will be healthy. To reduce weight, avoid fasting, junk food, fast foods, red meat. Reduce snacks in between meals and have a low calorie and high protein diet. Regular exercise, especially for the waist and hip area, aerobics, yoga, brisk walking. Try to reduce 4 to 8 lbs per month. Do not hurry on weight reduction as it will be difficult to maintain.
The second possibility is a vaginal infection. Vaginal infection is transmitted during sex, so you and your partner have to be treated at a time, or else you will get infected again. You may have white or yellow or grayish discharge with or without itching, foul smell, pain at the beginning and late towards the end of sex. Pain will be radiating to the back, thighs. The infection will cause congestion of the glands, and they keep oozing discharge even after periods are over, which comes as pinkish discharge.
You will need evaluation by a gynecologist.