Hi and welcome,
No, you needn't be worried. You are only just inside the Type 2 range. (HbA1c of 48 and above) and your fasting of 6.1 is better than many on this forum!
Your forthcoming HbA1c will only be to confirm your diagnosis. It is usual to do 2 fairly close together if there are good reasons to doubt the diagnosis, and I suggest your fasting test is a good enough reason. For a diagnosis this needs to be 7 or more. So you are very borderline, Normally, all HbA1c tests are at least 3 months apart as it is a sort of average of the previous 2 to 3 months. If it is within the diabetic range it will be an easy task to reduce it with a little care over your diet. You have been caught early, which is good news..
Well done on losing all that weight. That is brilliant and will be doing you a power of good.
I'm glad you explained your avatar, it had me wondering.