Grammar fix
do your head in
frustrate or overwhelm
to make you feel really frustrated, confused, or mentally worn out
expressionB2common
Hear it in context
Notice where the phrase sounds natural.
This form is doing my head in, I can't make sense of it.
Being stuck indoors all week was doing my head in.
Fix the pattern
One small grammar move makes it sound right.
Using it in formal writing; it's strictly casual speech.