iPhone won’t connect to internet

I sorry if this is bad I’m using a janky iPad lol. Literally everywhere else I’ve posted to has taken this down because my account is under 7 days old, yes Reddit I know, I can’t use my phone to log into my main account and I’m desperate. I have an IPhone 14 and I’ve had it for about two years. Today when I woke up nothing would load, I can’t even look up something on google because it won’t load. My iPhone says it’s not connected to internet when it is, and every other device on the internet is working fine so I don’t think it’s a router issue. I’ve reset the iPhone like shutting it off then back on multiple times, forgotten my WiFi and reentered many times, even reset the whole network on my phone and nothing is working.

To preference I can still technically use the phone. It turns on, isn’t lagging, or anything else out of the ordinary. But when I open an app it won’t load and says “no internet connection” when I am connected the internet.

I’ve called AT&T but they were as stumped as I am. Payday is Friday and I really don’t want to have to wait that long to get my phone fixed. Not even the data works right now if I turn my WiFi off. Once again my phone is connected to the internet but seems to think it’s not. I don’t have a VPN or any security apps that could be causing this issue. My sister says to put my phone in the fridge because that’s what fixed her iPod like 10 years ago when it had the same issue?! And I’m just about to do it because I’m running out of patience. AT&T put me on a ticket seven hours ago but they didn’t call back. I’ve don’t everything I’ve read online to do and I don’t know how to fix this.

I have a trip soon and I need my phone fixed. Plus I only have 3 months until it’s payed off and I could get a better phone.