2nd time in a month this as happened the exact same way...

I’m fine in the morning, then around 10:30/11 I haven’t eaten anything yet other than a few sips of coffee (this is normal), all of a sudden I feel nauseous, dizzy, & run to the toilet & start puking everything that’s in me for about 30-45 min straight. It feels like a knot in the middle of my stomach, and sometimes it tightens really bad. Eventually I was sweating so bad I ended up naked in the tub in fetal position laying in ice cold water and puking on myself. It was hurting so bad I was crying to my fiancé to make it stop, he wasn’t sure if he should take me to the hospital. Both times I got myself to my bed & fell asleep for a couple hrs to make it go away. Still hurt the rest of the day but wasn’t as bad or puking anymore. It goes away the next day. Is this what morning sickness is? I’m supposed to get my period within the week. Or could this be something else?? I’ve never felt that much pain from a stomachache before.