Yes,I would wait to see if your next due period comes first then take a HPT(first pee in the morning is the best)but you didn't indicate if you are having pregnancy symptoms.So,remember that HPT aren't always accurate either.I was 5 weeks into my pregnancy and all HPT came back negative and even a blood test.It all depends on the level of HCG hormone detection in your system.So,if you are having symptoms,don't panic if it comes back negative.Go see your doctor and get examined at that point.Good luck.