Worth taking a test ??

I have no symptoms. my period was so yesterday. I had unprotected sex during my estimated ovulation time. I took a plan b. about a week later I started spotting. which I presumed was from the plan b. Fast forward now to another week later so two weeks after ovulation my period is supposed to be here. but I’m assuming the plan b threw that off and since I started bleeding it work. I know it could be as simple as going to take a test. but I think the likely-hood of me being pregnant is very small because of the plan b.