you should contact steam support, change your password if you can. but definitely contact steam support, best thing is try to get on a phone call and have a employee help you directly
I already submitted a recovery but I dont know if it still possible because they already changed email and password. Prayge. Twitch chatter got me baited LULW
My degen ass is watching csgo game on twitch then this cunt messaged me saying I won a skin I clicked the link then I logged mt steam acc then boom 1 minute passed the email and password is already changed and I cant log in to it anymore. Dont be like me lol
steam support can recover it for you, they check your ip address and see if it matches with the most common one used with steam. i lost my account, contacted steam support almost immediately and got a randomised password to recover my account.