Help please.. can someone tell me what's going on here?

I have been up and down all night for the past 2 weeks and that's not like me going to the bathroom that much I took a pregnancy test 4 days before my period today and got a negative I know it's early but why am I getting up so much and by the afternoon I'm ready to go to sleep but can't due to work and I have had other symptoms to... craving foods I usually don't eat and I feel like I have started my period and I havent and a lot of cramping could someone explain this to me?