Could I be Pregnant?

Recently I've notice my boobs have been super sore and heavy. Even my boyfriend said my boobs gotten bigger amd I'm 18 so my boobs have most definitely not grown. But all of the sudden they bam got like probably an inch bigger lol. My period past two weeks ago so I kmow its not that, and I've been feeling upside down in my stomach and been needing to throw up constantly. I took a test and came out negative but

1. I might have took it wrong

2. My period isnt due in like probably 2 more weeks

3. Eating has also been hard too