I wish I could breastfeed my baby 😩

I wish I could breastfeed my baby 😩😩😩 ever since my stupid doctor gave me this stupid antibiotic for an infection and I was told not to breastfeed while taking the antibiotics... my milk-flow has dried up. I have been giving my baby formula but, I feel like a bad mother and like I am not giving my baby the right nutrients that a baby should have through breastfeeding. I wish there is some sort of magic I can perform for my milk flow to come back.