15 month old is a crabby, hot mess! HELP

This girl...she’s been sick a lot lately, but she finally seemed to be feeling better by the weekend. Nope! She wanted to nurse ALL DAY LONG on Sat and Sun and screamed bloody murder when I tried to stop. Everything I tried to do she complained about. This happens often enough to post about! She barely eats any solid foods. No fevers, no obvious sickness atm. What is this!? Is it a phase or something? Anyone else have a super crabby toddler? 😰