Ladies, moms, I'm writing to you ? I've been breastfeeding for almost …

Ladies, moms, I'm writing to you ? I've been breastfeeding for almost two months now, and today in the evening my period started. After that, my breasts stopped filling up, and there's hardly any milk left. The baby is getting fussy, so I had to supplement with formula. Ladies, who experienced this too or know what to do? Please tell me your story, how did your babies react? Thanks in advance))