Sudden change in breastfeeding

Nee
My little one suddenly went on a breastfeeding strike.He was drinking nicely till Yesterday and stopped suddenly today.he cries his heart out if i try to breastfeed him :(. He is comfortable taking expressed breast milk without any issue.  Hes been switching in between pacifier, bottle and breast fron week 1. He is 7 weeks old. So missing breastfeeding :(