Failure

I am a single FTM and I feel like a total failure. My baby is 5 weeks old and I’m already back to work. Im self employed so if Im not working then I have no income. Im working about 4-5 hours a day currently and pumping. My milk supply is low so i am also using formula. I feel like a crappy mom for going back to work this soon. I feel like a crappy mom for my low milk supply. Tonight in between feedings I fell asleep with the air conditioner on for about 2 hours. Again i feel like a crappy mom for falling asleep before turning it off. I feel like I can’t do anything right. I never imagined being a single mom and the lack of support from a partner is so significant. Im really struggling emotionally.