Someone answer my question 🙏🏼

So if anyone knows Carowinds, I went there today. If not, it's a big amusement park along with water park in North Carolina. Well, I will say I believe this was caused by lack of fluids but around 2pm I woke up and got a message right away to go, I hurried up put some clothes on and I went not too long after. Well I'm line to a water slide around the top (waited about 25 min.) I was on the verge of passing out, everything was getting dark, I could hardly stand so I sat on the steps until the first aid came to me (which was right away) and pouring cold water on my back and I threw up, I got fluids in me and I felt perfectly fine minus a little headache. I went back out to the park grabbed some food and about 15 minutes after I ate I decided to go on some rides. One ride made me felt nauseous with a slight turn but it took the next ride to bring my to throw up for a second time but I don't understand why for that ride, I then decided to go on another ride that wasn't as fast, as much turns, and that was pretty much floating into some waves and yet again I was sick. I've never been sick before even when I did eat before I got on rides and I go many times every season.

I am currently taking sertraline, and I have nexplanon. I've had nexplanon for over a year now so I don't think it could be that but I have just been put on sertaline; although, I haven't taken them the past two days. Could any of those be causing my sickness today? Or could it just simply be what had happened earlier in the day? They were spaced out, the first one happening about 3:30, the second probably around 7:30/8:00 and the last happening at 9:30. I go every year and I've never thrown up once on any of the rides I rode today.

Also, I didn't feel nauseated in between, I felt fine and then felt nauseous right before throwing up again and then I would feel fine again afterwards.

*** just to give props to one of the workers, whoever you were - THANK YOU FOR THE GUM YOURE THE BEST 😭❤️❤️