It's been about 15 days since I missed my period. Since it's my first shot, I know it's normal for your period to be irregular. But, My breasts have seemed to fill out a little bit, and i'm not sure if my nipples have grown but they feel a little softer i guess. i know theres only a .3% or 1% of getting pregnant. Me and my boyfriend have intercourse about every other day, and planned parenthood told me it was safe enough to use on its own.   That's the only "pregnancy symptom" I can think of. I am far from trying to concieve.  Should I be worried still?