hi ive been on birth control for 10 years,depo, pill and patch. i am now ttc since october, my cycle has been on average 16 days until now-im on day 30. ovulation predictor tests have been negative anytime i tested. for the past week i have had cramps,back ache and tender breasts. im worried about fertility as it took my sister 8 years to conceive. whats your advice.thanks