Breastfeeding

Is it normal to feel bad for giving your baby formula?? I feel so bad for giving it to him but we both have thrush and I'm so sore and my nipples are bruised and cracked and I keep giving him terrible gas and idk how bc I'm eating normal foods and not really any dairy. I know it sounds terrible but I'm just tired of doing it now. I'm a ftm and he's 2 weeks old. I just want him to stay healthy even though I'm giving him formula :/