Missed period? But is it to soon to worry?

Hi, I currently am using the pill as my form of BC. I take it as directed. My period is always on time. Never late. If anything, early. So the issue is, my cycle was supposed to start on the 21st and lasts 4 days so the 24th is the end of my cycle. Today is the 23rd and still no sign of AF. No spotting at all, but I do experience cramps periodically... Should I wait it out or ho take a test to easy my mind. In like crazy anxious to just know already lol!!!!!