Eric, Welcome to the forums !!

Read the threads about medications.
Keep reading the forums.
I'm on Metformin & don't have any side effects, I've heard of others here on the forums that they had had some side effects such as diahrrea but not feet pain.
I wanted to go on Actos but another side effect (I've read) is affecting the heart, so I need to do some more research. but the Actos for me wouldn't be to replace Metformin but to use with it. because, I think, they're different families of meds.
Congrats on your low A1C & your weight loss !!!
There are other things that you have to consider to lower your BG's, how many carbs you eat.
Also, there are other meds, such as Glipizide.