And as soon as you can access the play store, install a password safe, so you won't forget it again. Then you only have to remember one password (which you can write down and keep in your sock drawer) to access all your passwords.
LastPass Password Manager is good, but I prefer
Keepass2Android Password Safe - there's a version for everything out there (if you need passwords on your PC, phone, you use both Windows and Linux, etc.)
You should never use the same password for two different things, and with a oassword save you don't have to. (You also, at least with KeePass, have a password generator that can generate passwords up to 20 characters long, mixed upper and lower case letters, digits and special characters. That's a military strength password.)