I'm Not Pregnant

Bri
I've been having all of the signs or I thought they were signs. From swollen breast... Like they are growing rapidly, to crankiness & even a little weight gain, well my stomach seems a bit bigger & my clothes are fitting tighter. So today I took a test and its negative. My period supposed to start on Sunday and I haven't had any signs of cramps or anything. 
Can my symptoms be related to my period and not pregnancy.
Bc I'm really bummed out