Breast milk or formula

My baby is almost 2 weeks old. I've given breast milk to him throughout this period. However, I find it quite challenging as its only my husb and I in this house to manage him. Once my husb goes to work, it's just me. I'm thinking of just giving my baby formula milk hence stop breast milk. Is this okay? I feel very guilty but even with BM, baby is not full. So we still need to give Formula milk. Anybody just give formula milk?