Hey, hi again Amanda

Not sure what the issue is but you can try some of the google black screen suggestions and see if anything works.
If not you could try an iphone repair place to see if they can look at it and tell you exactly what's wrong with it. Not sure if you have any 3rd party iphone repair places in your area but there's even online places that you can send your phone to and would do some sort of diagnostics to it to figure out what is really wrong with it. Then they can tell you what, how much it would cost and you can decide if its worth spending they money to fix it.