Premiere Pro. App not responding. Nothing renders. No playback. Unresponsive leading to crash. HELP.

Premiere Pro 2023

PC Windows 11

Premiere seems to have comepletely bricked it. No media files are able to load in any of the project bins. Sometimes they can be scrubbed through by hovering over them but opening them shows media pending. Trying to play the sequence in my timeline shows media pending also. I can still jump between bins and tabs but no actual media playback. Eventually after moving around enough the program monitor just shows a black screen. trying to close the application results in a crash that at one point made my Creative Cloud UI helper and OneDrive UI Helper have application errors (Whatever that means) There was also a third UI helper message that popped up too but I didn't record that one unfortunately. The entire screen goes black, comes back again after a few seconds and shows me premiere pro open as an all white page apart from the monitor window which is black. I had to force quit my PC as it was completely unresponsive.

Here's what has happened so far chronologically:

-I was working on a project that was opened a few times over a few days. On the last day I go to open it but I recieve a premiere pop up telling me I need to update my video drivers. I do this and everything works fine for a couple of hours.

-A couple of hours into the project it starts chugging and playback becomes an issue. I make regular backups of the project so not too much is lost. Eventually I get the project finished.

-I start a new project and work on that for an hour or two before closing the applicaiton.

-The next day I go into the second project and recieve the 'low level exception occured in: importermpeg (importer:81)' and 'low level exception occured in importermpeg (importer:39)' messages. Also it has a message about frame susbstitution recursion attempt aborting on a clip. Not sure how important that bit is, it seems more like a symptom than the cause of the problem.

-It tells me that Adobe Premiere pro is running low on system memory. I have over 100GB free on my C drive, 1TB on my D drive and over 900GB on my E drive. Task manager tells me that PPro is using something like 4000MB of memory. I'm not sure if this is a normal ammout.

-So I go to move the playhead around my timeline and scrubbing chugs along, unable to play in real time on the monitor. Go to my project bins to look at video files and clicking on them either shows media pending, a black screen, or doesn't change from the last thing displayed before I tried to change it. After doing that I am now unable to view anything on my timeline either. Audio or video.

-I open and close the app a few times, restart my PC, uninstall and reinstall a few times but the problems keep happening. Emptied my cache, moved it to an unused drive, tried playing with swapping between the mercury playback renderers, loads of tricks that forum posts and youtube videos provide but nothing helps. I tried to create a new project file and start fresh but the same problems are happening.

I've scanned for malware and there's no problem there.

I read somewhere that premiere has problems dealing with clips that have different frame rates being in the same project so I've gotten rid of the outliers and still have the issues.

I started yet another new project and limited the ammount of video files I bring into the project so there isn't much to load in. after about half an hour of editing, cutting only 6 or 7 clips, the playback in the monitor freezes on a frame, the assembly bins won't show my files and trying to render in to out on my project just has the render bar stuck at empty.

I have deadlines to meet and this is freaking me out big time. The app was working fine 3 days ago and now I can't get my work done. Please help.