Possibly pregnant on BC?

So I'm over a week late while taking birth control. I've never been late on it before and am normally completely normal on it.  I took two test a few days ago both negative. I got randomly naseous the last two days along with a few other symptoms like frequent urination and bad fatigue. Am I stressing myself into thinking I may be pregnant? Should I wait until my next period is due or just take another test? I know it's normal to skip a period on BC but it still has me stressed.