I think my wife looked in my iPhone 15 and hacked me

Bob's answer is short, to the point and right on target.

With direct access like that, there's no way for anyone here to know what your wife did with your phone, or the information on it.

Can you even access your own account anymore?

https://appleid.apple.com/

If not, then she changed the password.

You have answered your own question.

She's has been on it a times

That tells your fellow users here nothing. Does she know your user account name? Does she know the password for your account? Did she add any apps, or remove any. Did she delete any of your photos, emails or messages?

Just as you would at an Apple Store for the staff there, you need to give us something to work with.

Maybe ask your wife if she messed around with your phone?

Hello~ What kind of “weird” stuff related to iOS? Perhaps if you could give us some technical details about what you are experiencing then we could give you some suggestions?

~Katana-San~

What did she say when you asked her about this?

We can't help on husband and wife personal issues.

IF she sign in to your iCloud

Go to your iCloud and change your password