How to make my iphone appear on my computer screen?

I left my phone in my mom's car when she dropped me off at work. I don't have her new phone number to ask her to bring it back or my boyfriend's to tell him I won't have a phone all day. I was wondering if anyone new of a way I could pull my iphone's screen up on the computer and like actively go through my contacts on it. I never backed it up so I can't use Icloud. Any suggestions are welcome.

You should back it up,. N i dnt hav another new idea to backit up

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