Pregnant or plan b symptoms???

I been having nausea literally for everything I see or in a fast moving car. I also been more tired than usual. I’m a week late on my period. And it’s been 3 weeks since I took plan b. I took a test 2 days a ago and it was negative. Also I had light pink spotting when I wiped earlier this week. Should I take another test next week or just wait for my period to decide to show up??