I thought I had a cold leading up to DS's birth. I remember being in the hospital asking the nurses to bring me boxes of tissues because I had such a drippy nose and I was just miserable. By about half way through labor the cold symptoms disappeared and I was fine. By the time DS was born the cold was just gone. Talking to my midwife this time around we think it's part of what my body does at the end of pregnancy and just means that the baby's on it's way!
Anyways, I hope you feel better soon, and maybe it's a sign that your baby's almost ready to meet you!