The last time I got my period was in may 17 and i have swollen breasts and i also have cramps and my lower tummy is hard and im always feeling sick to my stomach,I have weird cravings for food i dont really eat. I have the content urge to pee alot and i took 3 test n all were neg. Im never late for my period. Im 23 years old and this is my first time and my friends n family just tell me to keep taken tests but i dont know what do i do? do i go to the doctor?