Many Diabetics suffer from High Blood Pressure - Hypertension. It is something that can be treated well but first of all you need to know that you actually have it.
It is not something that you will always feel or notice, the signs and symptoms can often be missed or confused with something else. The only way to find out if you have it is by testing your BP.
If you do have high BP a single test once in a while is not going to be much help so just having it tested at a Clinic every few months is not really a good way to know if it is under control.
The best way is to buy yourself a good quality Arm Cuff tester and test at home at various times of the day/night. Then you will know how your BP is throughout a day. It will vary due to many things, so don't expect it to remain the same all the time.
The charts that tell you what is a good BP to have are for people who have no other risk factors.
If you are a Diabetic the present recommendation is that your BP should be lower than 130/80 if possible to avoid further complications. What is 'normal' for a non-Diabetic is NOT 'normal' for a Diabetic. You need to understand that first thing..........
Here is a link to the UK Blood Pressure Association website where there is much information.