Metformin (dosage increase?

Hello everyone - I’ve been taking Kit 1 and have had negative reactions to all but the Metformin, which seems to do well.

I currently take one 500mg XL tablet every afternoon with no negative side effects. I would like to increase my dosage but the doctor via Hims Chat said they would need me to do blood work for creatinine levels before they recommend a higher dosage.

I have no past history with kidney issues. I know I’m not asking for doctors advice, but has anyone tried increasing the dose on their own?