Hiya CN and welcome. If we go by the stereotypes of T2 (always fat, yaddayadda) then being honest, a lot of the practice/diabetes nurses that sit and lecture us about our lifestyle, should practice what they preach lol.
Seriously..get your diagnosis officially. You most likely are diabetic and it won't go away, even if you refuse to accept it!
The good news is, there's tons you can do to make those levels come down, although it can take a few weeks.
Probably one of the most important things you can do (and not easy as an HCP) is have an open mind. Unfortunately for most, the NHS advice of starchy carbs being necessary is disastrous and nearly always causes a hike in BG levels. Cutting spuds, bread, rice and pasta of ALL types is helpful, cereal is another culprit and that often includes porridge.
Get yourself a monitor and start checking your levels before and after meals. Get the groundwork done first, so you can make the changes you need to. Many of us have levels close to or in normal range, acheived by minimal Meds or diet alone. It's really not the end of the world, and nothing to be ashamed of...honestly