Age 20, Height 5"7, weight 12st 9lbs. I have polysytic ovary syndrome and suspected endremetriosis (waiting to see a gynacologist). I am going on holiday and want to take northisterone to delay my period. Thrombosis runs in my family with both my nan and mum having had a blood clot in the past. I take citalopram. My doctor has prescribed this to me but Im not sure she looked at my medical history. Is it ok to take for 2 weeks?