I need some advice please...my little girl (just turned one on Wednesday the 11th) she has been sick…

I need some advice please...my little girl (just turned one on Wednesday the 11th) she has been sick and we went to ER on Thursday morning. Since Wednesday she hasn't been eating or drinking any solids,water, or pedialyte only nursing! She has been nursing every 3-4 hours (I know A LOT for her especially at her age) but it's all she wants. I finally got her to start to eat solids today however, my boobs are throbbing in pain I guess because of her nursing so much! Also, I'm going back to work tomorrow (been off since Thursday due to her being sick) but I'm worried because she has been refusing bottle or sippy cup since she's been sick. Any advice?! Sorry for the lengthy post.