Late period every month

Every damn month, I’m late on my period. So every time I should be starting, I gotta play the guessing game on if I’m fucking pregnant or not. And my period symptoms are the HELL OF A LOT like pregnancy symptoms. Why??? Im currently nauseated, my boobs are sore, a lil crappy but apparently that don’t mean shit because with both of my pregnancy’s, I thought I was having period cramps right before I found out I was pregnant. And, I keep fucking gagging for damn reason, it’s really getting annoying. Then, I about throw up wiping my sons butt cuz it smells like he ate something dead. And I’m thinking, okay I’m for sure fucking pregnant. Im 3 days late, I’m gonna go get a pregnancy test. And it’s NEGATIVE. Why does it have to be so complicated? Aunt Flo is a bitch and I’m tired of her shit.