Fortnite bluescreened my pc, now UE5.4 won't open.

Idk if this is the right tag to put this under, but I really need help.

I was gonna go on Fortnite today since my mom wanted to play, but it bluescreened. That’s fine, I’ll just reopen it once my pc reboots. (PC reboots). I click on Fortnite again. It bluescreens my pc again. OK. I’m just gonna give up and try to work on my game in UE5.4 instead of wasting my time constantly bluescreening. I click on my project in it’s folder, and it says “Can’t find engine, locate manually?” I hit yes, but literally nothing happened. I tried multiple times, thinking it could’ve been a minor bug- but no. It just won’t bring up a window or anything to grab the folder manually. I open the Epic Games launcher, and not only does it tell me I have to reinstall Fortnite (even though it was already on my PC), it says I never had any UE??? My projects still show up at the bottom, but it doesn’t show any UE version in the downloaded section. I have UE5.4, nothing else. I just want it to work, or have some “locate file” option instead of just having to redownload it- but not it, because the only version of it is 5.4.4, which is not the one I’m using. Also, tried to download that one, but it keeps freezing every time I click on the “choose location”. WHAT IS GOING ON???