Locked out of my Windows 10 , and need some advice asap!

So about four days ago I was logging into my computer and around every 2-3 months my computer password expires and it makes me reset to a new one. I was so in the moment and so busy when I did so and cant remember what it is. Ive tried doing as my computer has directed me to with getting a usb flash drive , with the one pop thats wizard. Ive tried but I dont have a "reset disk". Im just lost and have no idea what to do. Please help! Any advice would be great. Thank you so much for your time! btw. If theres no way I can unlock my computer without losing my pictures , its a risk I will have to take.