Do I Have a Virus? Urgent Please Help

I was on Pinterest and I saw a cute picture and wanted to add it to my board. By accident, I clicked on it which took me to a website while still on the app. All of a sudden, I get an alert telling me

Warning: your iphone may be locked in 24 hours.

Me being scared, I clicked out and went back into the app. But when I went back in everything was normal and there was no alert. Now i’m scared I may have a virus.

My phone is not jail broken by the way.