My PS nurse said I can't use Afrin Nasal Spray the week of my Breast Augmentation surgery. Is this true?

I am having breast implant surgery in 4 days and I have a cold with a lot of sinus congestion. My general practitioner prescribed Afrin for 3 days for help sleeping and to relieve sinus pressure. but my surgery nurse said it's a "thinner" and I can't take it the week of my surgery. Is the nurse is just being over cautious? I have a hard time believing that if I stop Afrin on Saturday it will still be in my system on Tuesday morning. Is there a different decongestant I could consider? Thanks!