I'm a shopaholic like you. The only way to control it is buying absolutely nothing for a given amount of time.
Nothing at all. Not even things you need. Or think you need.
I threw away four pairs of flipflops that were a little worn out and spent 4 months on the last pair.
Didn't buy any. Not even cheap ones at the supermarket. And I really needed to change them. I washed them every night. For four months.
Now I came into a little money and bought a few pairs. Four months later.
That works for me. Builds character. Makes you feel proud.
Buy nothing. As in nada until your job situation comes to fruition.