Diskpart-Clean accidentally. How to recover partitions with data? Help

Hello everyone,

My apologies if I have posted this in the wrong section. I am in the middle of a major panic attack and am trying my best to stay calm to get some help.

This is my situation ->

My Western Digital 1 TB Hard-Disk had 3 partitions.
i) C: Around 150 GB (operation system -> Formatted)
ii) D: Around 450 GB (Used around 250-300 GB)
iii) E: Around 350 GB (Used around 200 GB)

I had formatted my C: Drive to install a new operating system when I ran into some issues with MBR/GPT conflicts. I read a thread where it stated that I oughta try to clean the partition which I did but I ended up cleaning my entire disk with all partitions gone.

I panicked and created a new partition. It is 931 gb big and covers the entire hard disk. I honestly don't know why I did that. Just realised I better stop and ask guidance before proceeding. I havent done anything after that.

It had some extremely important files (I'm an animator and it has about 85% of my demo reel). I was just beginning to back up the important data in my hard disks and this has happened. I followed the advice given on this thread,

diskpart/clean by accident....need to recover partitions,begging :'(

I have just downloaded the bootable version of Partition wizard (I don't have any other harddisks to boot from.) Just about to boot with USB and see what happens. But I would really appreciate help and guidance on what to do to proceed further. Any help would be deeply appreciated. Please.

Currently running a quick scan using MiniTool Partition Wizard. Its running at a slow rate. 4% right now. It seems to have detected 3 lost/deleted partitions so far but the partitions sizes seem to be (2.45mb used / 3.01 mb). Guess I will have to wait for it to hit 100% before knowing anything more.I will update a picture of what I get once it completes. Meanwhile, any advice on any other alternatives / procedures I should do will be greatly appreciated.

Ok, the results of the Quick scan just came up. There were results that showed partitions that I used to have about a year back before I changed them and made new partitions. The files that were there back when those partitions existed seem to come up in the file explore option but none of the files created afterwards are visible. I am running a full scan now.

Hi kevdetok, thanks, I'm trying my best to keep myself calm.

The full scan is at 43% right now and it is showing a lot more partitions than the Quick scan did. I am hoping that the latest partitions which I accidentally cleared also gets shown up in this.

I came across Recuva a while earlier. But it seems to work best when you use it from within an operating system. Since I dont have anything to boot with, I needed a bootable recovery utility.