Formula

My daughter has only had breast milk and I hope to be able to give her breast milk for a long time. But as of lately my supply has dropped. I’ve started taking Fenugreek and earth mama milkmaid tea I’ve also started eating steal cut oats every morning in hopes that my supply will increase again. In the mean time would it be okay to top up my daughters feeds with formula, she seems to be starving after every feed and I don’t have any milk left in me to feed her. If I were to give her one bottle of formula once in a blue moon would that ruin things for breast feeding?