Nested AND IF problem Syntax and solve errors

Hi,

I hope someone can help, I am newbie so my apologies if my thread title is incorrect.
I am creating a simple Gannt chart and am using conditional formatting to display the Gannt bars.
I use the formula

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=IF(AND(N$9>=$K11, N$9<=$M11),$I11,"")

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This part works well and populates the cell with the value contained within $I11, allowing me to conditionally format the cell in the colour of my choice. However I would like to add a current date timeline. I can do this seprately by using.

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=IF(N9=$U$3,"È","")
#

This shows an arrow "wingdings character" when the current week number matches the week header in my gannt chart.

Problem,
What I would like to do is combine the first If statement with the second, so under normal conditions the gannt bar is displayed but when its the current week the arrow/character is displayed.

I am struggling firstly with the syntax and I am uncertain if this is even feasable because i am asking the cell contain to different responses...The arrow/week number is the priority if "true" and then if not the current week number and a task is scheduled for the week display the gannt bar...
I hope this makes sense...?
I can attach my work in progress if it helps..

Thank you to any responses in advance...

Mike