Welcome to the Forum, Nikki! :welcome:
Very glad you found us ... sorry that you had to. You will find a lot of info, support and the best kind of nosiness here.
At your levels, acidosis should
not be an issue. Your Metformin, however, may be causing unpleasant side effects. Fortunately, Metformin also comes in an extended release (ER or XR), which is usually easier on digestive systems. You'll want to ask your doc for Metformin Extended Release ... and you may also be able to decrease your dose.
Blurred vision is pretty normal as your glucose levels go down, and spikes may result in a comeback.
The Good News is ... this is almost always
temporary! If you can keep your levels down, your eyesight should straighten up, too.
Kudos to your doc for diagnosing you at 5.5! Too many docs wait until A1cs are far higher, and complications have already begun. If you can achieve good control and keep it, you should have a long, healthy life, diabetes-wise.
Nosy Question (as promised): Were you given an eating plan?
Others, no doubt, will come along soon, but for now I'd like to leave a couple of links on diabetes and food that you may find helpful: