Xiao Bai Tu &Other experts - AP & I485

Dear Xiao Bai Tu and other experts: I submitted I485 and AP at the same time. Both of the two applications are pending now. I just received notice requesting additional document for I485. Will this delay my AP application? I planned to travel in May and purchased airline ticket already. What could I do if I don't get my AP by the end of April? Thank you!