Watery period due to stress or pregancy? also it doesn't smell at all, please help

Pregnancy concerns: If you're worried about possibly being pregnant, the most informative answer is a pregnancy test at least a week after your missed period. Menstrual periods have blood in them -- they may be brief when on oral contraceptives. A "watery period" could also be some kind of discharge. Please see your physician, and let him/her examine you.