Sick during TWW

My fertile week was Nov 11-17th, and i ovulated Nov 15th. All week I have been sick with a severe sinus infection and cold (I went to the doctor Tuesday). Could being sick prevent pregnancy in any way? Or keep a fertilized egg from sticking? I have what I think could be IB when I wiped yesterday morning and the night before, so I'm trying not to get my hopes up. Thanks for any advice!