Hi doctor. What time should the doctor advise me to measure my blood pressure? How to measure correctly? I sincerely thank.

When I woke up this morning, before getting out of bed, I measured my blood pressure in both arms. My left arm was 133/82, and my right arm was 125/81. I've read that blood pressure is usually higher when you first wake up. So, doctor, I'd like to ask, what is a normal blood pressure reading right after waking up?