Since I had my daughter 14 months ago my joints and muscle have just weakened I am in constant pain 24/7 migraines and fatigue no appiete at all?

Get checked out. Pain localized to the joints with fatigue can be the result of an rheumatoid condition. Pregnancy can sometimes trigger some of the conditions to present themselves. There is blood work that can be done to screen for several issues. Depression could also be a cause. Get checked out by your pcp or ob/gyn.