Post nasal drip?

Breezy

The last time I was pregnant with my son (passed away when I was 5 months pregnant) the first symptom I noticed was I got extremely sick with some kind of head cold. Sore throat and I lost my voice. This time around at 6 dpo I’ve had this scratchy throat, dry cough, and some post nasal drip, and there’s been a weird smell in my nose (I can’t really explain it.) It’s slightly different this time around. I don’t want to get my hopes up because we have been trying to conceive again for 6 months now with no luck. My period is due tomorrow and I’ve taken a couple tests now that keep saying negative. I know I could be just testing too early. Am I just wishful thinking?