It's very normal for your blood pressure to go up and be high when you first wake up and should go back down once you get going throughout the day.
Blood pressure normally goes up and become high when we first wake up as a result of our bodies normal circadian rhythm.
Our bodies normal circadian rhythm is cycle that is a 24 hour cycle that affects our sleep and wake cycles and during the morning when we wake up the body releases hormones such as adrenaline and noradrenaline which can also cause an increase of blood pressure.
If your blood pressure goes back down during the day then nothing is wrong unless the blood pressure stays too high or gets way too high.