HELLLLPP

I’m exclusively and I mean exclusively breastfeeding. My LO absolutely REFUSES the bottle and a binkie. She about to turn 6 months on the 29th but my milk supply has dropped drastically and I don’t know why!! I didn’t change anything. I just bought these supplements but I’m not sure if they’re helping. I’ll be devastated if I can’t breastfeed my daughter to at least a year. Help!!!!!