I agree with Blueberrybook that some months are just expensive. And, as someone who also moved recently, getting settled into a new place is expensive even if you already have a good amount of stuff to fill the place. This month, I'm spending significantly more than usual because of stuff I need for my new place. For example, the lighting in my place is AWFUL, so I bought a new lamp. But, it isn't enough (the corner where my table is at is super dark) so i need to get another lamp so I can actually see what I'm working on at my table. Because of outlet space, I'll have to get a surge protector when I buy the new lamp so I can plug in everything I need to in this spot of my apartment. Thankfully, I can get a lamp for $10. The lightbulb for the lamp costs more than that.

All that is just to say getting settled into a new space takes both time and money. And, sometimes, you just need new clothes.

Also to your questions, I think some of it comes down to your motivation for shopping and what the spending is doing to your bank account since a person can overspend without being manic.