Hi Emie,
The blood test starting H is the HbA1c. This test give you your average Blood sugar levels for the last 2 to 3 months.
The figure they have given you is the DCCT they have tried to stop using this measure and you will see on here a different HbA1c
If you use this link there is a converter
http://www.diabetes.co.uk/hba1c-units-converter.html
Your number of 7.2% equates to 55.2. That's not high compared to many that are diagnosed, but you need to get it lower because at that level you would over a period of time start to have complications. There are many on here with double that number when they started and they are virtually non diabetic within months once they have got it under control through the diet and some medication & exercise.
You will see on here nearly all people test on a regular basis their blood sugar levels when waking up 'Fasting' and pre meal sometimes 1hr after eating but definitely 2hr so they know what food raises their sugars too high and can avoid them in the future.
Those measurements are in mmol/L When these figures are normal they should be between 4 & 7mmol/L Fastings in the 5s first thing on a morning.
Your number of HbA1c 55.2 equals a mmol/l of 8.6 average, that means that you have been above 8.6 and below 8.6 for the previous 2 to 3 months to get this average, where for normal people their average would be in the 5s
I hope I have not confused you as it is a lot to get your head round, but it will make sense as you move forward.
You BMI looks good, your cholesterol looks good but you need to find out what the breakdown is LDL & HDL it's important, you are allowed to get a print out of your results for you HbA1c blood test + cholesterol + Liver Function & Kidney Function they takes all these tests as they are very important when diabetic you can get print out of all.
Neil