I missed my period but have light spotting and tender breast am I pregnant?

Did you have sex? Then yes, after you miss your next period you need to take a pregnancy test

Yes I didvi also took a test 3days after my miss period it came out negative

Wait another week and see if your period shows up late. If still no period at that time, try another test. Make sure you follow the directions carefully.

Your period may just be off a bit this cycle or you may skip it altogether. If test is negative again, wait until next month when you would expect your period or you could see your doctor about having a test in the office.