could i he pregnant or am i overreacting?

so my "period" was weird I did consistently bleed when I did it was light (light red/dark pink and only lasted 2 days) and have had brown spotting for the past 2 days. well I have been sick for the past week and by that I mean headaches, nausea, runny nose, and sore throat. I was checked for strep but came back negative and I don't have a fever. I know my temps dipped but they went back up. is this afternoon just messing with me or could it be possible. (I don't want to waste a test if I'm overreacting)