Is this normal behaviour?

When my girlfriend has her hair or eyebrows done (she doesn't always inform me, which is absolutely fine) she often asks me the next time I see her if I notice anything different about her. If it's a new lipstick or her nails have been done I do often comment on it, but minor changes to her hair (like an inch or 2 off) or eyebrows I find hard to spot. Usually if I haven't noticed any change I will say so. My issue is, she often gets quite annoyed, upset and criticises me if I don't notice, often to the point of saying I do not care about her. Is this normal behaviour? Should I be able to spot these changes, especially if I haven't been told beforehand that she has a hairdressimg appt etc. It feels like she is testing me or seeking reassurances and it just puts me on edge. Like I always have to be on the look out for things incase she asks me.

Is this normal behaviour?
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