Okay, I'm not sure if this is normal, but everytime I sing outside (park, backyard) I always lose all my confidence. I mean I can't really hear myself and I'm always unsure if I'm singing alright

I also can't tell if I'm singing loud enough. is this just a temporary phase...?
I'm actually the other way around, being outside with a friend or two is about the only time i can really belt stuff out.
Might just be nerves! Make a habit of it more often and you'll get over it as long as you stay confident in your ability. Also remember singing outside won't necessarily sound the same to your ear because the acoustics aren't quite like singing in a small room now are they?
Quote by Tire Me.
Dumbledore wasn't the only headmaster that night.

Quote by CTFOD

I can impersonate Emperor Palpatine, Bob Dylan and the Joker. Simultaneously.

Quote by Kumanji
Why sho blowin' in the wind, Jedi?