Am I pregnant ? Been feeling sick

Hi guys, I am reaching out because I do need some advice on a situation I have going on since Monday. Monday I was having stomach aches but I thought it was normal because since I got nexplanon my stomach aches are all over the place. Throughout the day I am drinking smoothies and I had chicken, rice for dinner. After dinner, I had some snacks and ice cream. I was feeling fine I went to bed. Later into the night I’m sleeping perfectly fine but my stomach hurts and I feel nauseous. I wake up and I start pooping a lot, first hard then soft. After I ended up throwing up 4 times in a row. Once I threw up 4 times in a row, randomly. I had straight up Diarrhea, to the point everytime I farted. It wasn’t just a fart, I was having bad diarrhea. I went to bed and slept but since yesterday I’ve been feeling nauseous, light headed, low blood sugar, dizzy when I get up too fast, my stomach is killing me. Today I woke up, I had to poop again but it was hard, and I’m spotting pink. I’m currently on nexplanon so my period time frames aren’t regular, they are all over the place but I took a pregnancy test yesterday. It was negative. Should I be worried these are pregnancy symptoms or do you believe I got sick with food poisoning or stomach bug ? I need advice thx