Could I be?

So I'm in my 2ww and tonight I had to pee a lot more then usual and I had to pee even when I hadn't drank anything and the past couple of days I've watched tv and felt like I was about to cry I took a test today it was negative but I still have 6 days till my period and so I wasn't worried and I've been hungry idk if that's a symptom but I've been craving hashbrowns but I wanted to know what were ur symptoms at 3 weeks? Cause idk if this is over thinking or I could be pregnant.