How much weight a woman can gain while ovulating and cycle, when is this gain expected? can clotting and heavy periods cause bloating and weight gain all the time, i just can't loss weight

Very little: Weight from hormone fluctuations during a monthly cycle can go up/down a small amount, most often right before or on the first few days of actual menstrual flow. But, this is just a small amount and is not the cause of overall difficulty losing weight. See doctor to review nutrition, exercise, other health/metabolism issues that might need intervention.