4 days late

Hi! I'm extremely panicked right now.. I'm 17 and have been sexually active for the last few months. As of right now I'm 4 days late and have not had a period in 33 days. We were always safe except for maybe 2 or 3 times but he never finished in me and when I was "fertile" we used protection.. Am I over thinking? Should I take a pregnancy test? Has anyone else gone through anything similar..?