I took norethistorone to delay period on holiday when I came back stopped taking and came on period two days later was a normal period then no periods for three months I'm usually every 28 days and lasts five days came on period a week ago after three months and was flooding and clots can't go to work can't go out door doc gave me norethistorone to stop bleeding been taking for two days and now just light bleeding but pains in tummy when shall I stop taking them ? And will I flood again as soon as I stop ? Help :-(