I too am prediabetic. I need to be testing my blood sugar, but I haven't been doing so well with that lately. I don't even know where my test taker thingy is at the moment, probably packed away somewhere since I wasn't expecting my stuff to be in storage this long
103 is a great reading though, as anything under 100 is considered "normal," or non prediabetic, which means you are probably pretty darn close to accomplishing your goal of avoiding diabetes.
Or at least you're well on your way, which is awesome.
Are you taking anything to regulate your blood sugar?