Wont turn on anymore

so yesterday i had put my phone on my bed but then it slid off my bed and fell onto my floor, it has a little line crack in the top right corner of my phone. I tried resetting it but nothing happened. When it did turn on above the crack would be all white then the rest of the screen was completely black. ive had phones that have dropped and cracked way worse so i dont understand why its not working. but back in December i had got it fixed at this place in the mall, i had a very protective screen protector on it but then after a while it started to get dirty and come off so i took it off. And a couple weeks after i noticed my phone screen at the top could pop out a little and was lose and also my home button was very lose to, i could literally spin my home button, which in my opinion is not suppose to happen. So maybe that has to do why my phone wont turn on? or some people are telling me its the lcd , im just wondering how i could fix it like if id just need a new screen or not.