This all started in February when I didn't get period at all. Period came first week of March then in April it was late and I was having bloating and constipation cramps was terrified thinking I had ovarian cancer. In May not sure but was on time then last month it was on time on the ninth. This month I haven't gotten it almost two weeks late and I have all the symptoms of a period but still no period. Im starting to worry if got something wrong with me like pre menapause even though im 28 even more afraid I got ovarian cancer I don't want to go to dr I was just there two months ago and he said I was ok.I always before this always gotbperiod on time I don't understand please help give advice