Once upon a time, I used to work and spend every last penny on myself. I could go on holidays, spend a fortune in Topshop and own 77 MAC lipsticks and not even bat an eyelid (ahhh those days at University). I thought I was an adult because I could buy whatever I wanted. Then I graduated and entered the real world. At first, aside from rent and bills, I could spend everything else on myself, it still felt great that I was working so hard and really reaping the rewards. But then, at 24, I became a single mother and adulting got hard. For a long time I didn’t…