Hi Middie and a warm welcome to the forum
Don’t beat yourself up about all this; let’s just have a look at what is happening.
What do you normally eat during a typical day? What did you eat today? There are many people on here who will be able to help point you in the right direction.
Don’t anticipate a lecture by the diabetic nurse either, hopefully she will be very kind – but in any case do let us know what happens on Monday.
They may not necessarily put you on medication either as they may let you have a go with changing your diet first, with the help of others on the forum it has worked with many of us so it is a possibility. Apparently metformin only makes a marginal contribution to lowering the BG levels and diet, as in what you actually eat, is often the key.
If you have any questions there will be someone on here to answer them.