Some of the signs that your periods will begin soon include bloating, backache, increased body temperature and headaches. You may also experience cramping, which is very common, light brown discharge and mood swings. There are also people who experience rashes and cravings. Check out http://www.signsofperiod.org/.
what common is cramping very badly headaches the says where you want to just lay in your bed and cry all day backache sweating clear liquid on ur underwear rashes get a whole bunch of pimples moodswings and yea I think that's most of them