Always double check an unexpected and high level in case you had traces of something on your finger contaminating the sample. A confirmed 33 needs an immediate phone call (not message) to a dr (111 if out of hours).
17 is still too high though not quite as desperate. Please keep checking it’s going down and seek urgent help if it’s not and you feel unwell in any way at all. Are you able to check for ketones?
Whats normal for you? Is there any reason it should be so high, skipped meds, sick, insulin not working for some reason? (I know it can go off in some cases or lines get blocked etc but better speak with another insulin user for more info there)
Your profile doesn’t say what type or medication you are on. Can you update this so you can get relevant advice going forward.