In 18 years old and I have one questions. Last month in June I started my period in the middle of the month and usually when I have a period the next month I start around the same time. I ended my birth control a couple months ago too. I haven't started my period this month (July) and I'm kind of worried. I have slight cramping but no bleeding and it's almost august. My nipples are also tender, not the breast itself but just the nipples. Could I be pregnant?