Itchy throat during pregnancy?

Okay, so I don't know if I'm pregnant or not, but I've been having very light spotting that's been light pink colored for the last 3-4 days, period was due yesterday and never came, am not having normal PMS symptoms but am experiencing some other symptoms that could be related to pregnancy.

I tested yesterday and it came out negative but I know until AF is here, I'm not out.

I was curious if you guys had worse allergies when you got pregnant and if you experienced itchy throat?

My allergies have been awful!!! And I notice my throat itches a lot when I sneeze and am congested and sniffly.

A little help would be greatly appreciated.

What were your experiences? And how late did you find out you were pregnant?