Fiancé left me I’m a sahm how do I overcome this ?

My fiancé just left me we have 2 children I’m a stay at home mom for the past 4 years I’ve worked only about 7 months of those 4 years I have no money saved I have no car no license and I’m living with my parents. Any advice on how to get my shit together. I’m so lost rn I feel so depressed but I know I have to provide for my children.