How to lighten hair?

hey ladies. so i recently, about 2 weeks ago, got my hair bleached. i noticed when i got back home that it looked a little yellow. i hadn’t realized it at the salon, probably because of the lighting in there. but really, i didn‘t wanna go back and pay extra to lighten it even more. i also looked into buying purple or blue shampoo, but like everyone, i’m on a tight budget. so, do any of you know home, cheap, SAFE remedies to safely lighten my bleached hair? thanks!!