Usually my cycle is irregular.. From 30 to 45 days.. At times even for 60 days used to take tablet to get periods.. Mother of two kids.. Taking thyronorm everyday.. This time it's been 45 days still no periods but for past two days light brown spotting ( light brown) is there I see it once or twice in a day while urinating.. No chance of pregnancy as we are using protection.. Also we had it month back ( 15th of may) last period date is 30th April.. please let me know the reason of brown discharge..