 [ Symptoms ] been on birth control for almost a year but i have been having pregnancy symptoms  i have been on loloestrinfe since last september and have not had a period since then which i believe is normal for that medication over the past few days i have been really constipated had cramps and when i have wiped there is been a little bit of light pink and i have no idea what it is my boyfriend and i have sex without condoms but i have never missed a pill a lot of times it is roughdeep sex and i have had cramping before from him hitting my cervix but i have never had the light pink symptom [ Disease ] this is so variable it would require an individual evaluation an special x ray can show growth plates and determine if they have closed or are closing    this will give you an estimatel better yet seeing a pediatric endocrinologist would take the evaluation to a higher level thirteen year olds may still have plenty of growth but it will take a hands on examination review of several years of his growth charts and perhaps an x raylabs