Glad things worked out for you, that’s the most important part. You’ve nothing to feel guilty about - if it’s any consolation, I had no supply issues yet I topped up the babies’ feed with formula whenever needed. The baby is perfectly fine and super healthy but you’re right, in the middle of all the pro-BF mama’s out there, sometimes you do end up feeling a bit low for doing things differently, however it’s your kid and you shall always do whatever is best for the two of you, period.