Hello, I just switched my facebook account to another and i can't log in into my old on...

To recover your Facebook account click https://www.facebook.com/help/contact/183000765122339 then enter your email or phone number into the space on the screen and click “Search”. You should see your profile picture show up on the right side of the next page with an option to send a code to your email on the account or the phone number on the account. Choose one, then go to your email or phone number you choose to get the code. Enter the code and click “Continue”, from there you should be prompted to create a new password. Once you create a new password you should be able to log in.