Will Headaches And BP Caused By Primolut Settle Down?

I began taking primulot 3 x per day three days ago to delay a period due to travelling overseas. Today (day three) I am experiencing a bad headache despite the fact that I am fully hyrdrated and the pharmacist just took my blood pressure and it was 167 over 87, it is normally 135 orver 65. I am an extremely fit (ironwoman) 50 yo. Will headaches and BP settle down after a few days?