I have had a small cold for 3 weeks now, just with runny nose, sore throat, and coughing (coughing didn't start until a week ago). My period is 2 or 3 days late. I'm 22 years old, 5'6", and 125 pounds. My husband and I have been trying to get pregnant. Took a pregnancy test yesterday and came up negative. Can a cold delay a period?