A week late and now have a cold?

I know this sounds odd but could that be a sign? I haven't been sick (other than asthma related issues) all year and now I'm a week late and woke up with a sore throat, drainage, and a headache. The headache started last night. AF was due 11/11 and it's now 11/18 with no sign of her. I believe I'm about 20-21 dpo but I don't take tests I just use bodily clues. I've had BFN the whole past week except today because I refuse to test again until next week. My other symptoms include mild cramping for about 10 days, sore breasts/nipples off and on, and more fatigue than usual. Any advice/opinions/similar stories appreciated!!