mercury from seafood

Yevgeniya
Hi ladies. Does anyone know when is it safe to breastfeed your LO after eating ceviche, salmon and dolphin fingers all in one week? 
My milk levels have been diminishing but once I pump or try to give him my breast it comes back in small amounts. Right now I have sligh lumps in my breast from milk not being pumped out. This past week I wanted to eat some ceviche and other seafood but now my worry is when can I resume to pump and give it to my baby. He eat formula more then breastmilk but I still try to give him my breast milk for the health benefits.  
Any one know or have a Lactation consultant they can refer me to, to ask that, cuz the Lactation consultant that I had talked to last month she stopped replying to me.