Scandinavian Defence queen e5 I'm new to chess (around 1000), and I like to practice the Scandinavian defence. I started to check the theory related to it, and I've never seen a single source talking about this queen move after Nc3.

[FEN ""]
1.e4 d5 2.exd5 Qxd5 3.Nc3 Qe5+


I guess it's a bad one, otherwise they would mention it. But why is it a bad move? I've been playing this since I started (unconsciously) and I see no particular drawback (I just need to be careful not to make my queen stuck). 

I understand that this opening violates the rule of development, but I don't feel the late when I play it. I often find a way to harasa my opponent (maybe it's because of my low rank, it becomes more visible at high rank?). Here are 2 variants I often end up with. As you can see I develop as good as white and I have even the queenside castling (almost) ready.

When defending with bishop:

[FEN "eoui"]
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qe5+ 4. Be2 Bg4


When defending with knight:

[FEN ""]
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qe5+ 4. Nge2 Bf5 5. d3 Nc6
This is a bit trivial as an answer, but too long as a comment. You claim that you can develop "as good as White" but that is simply not true. White begins by interposing the Bishop 4.Be2. You play 4..Bg4. It is now a mistake to play 5.Nf3 because 5..Bxf3 spoils whites Pawns and makes his King insecure. But 5.d4! also gains a development tempo, and forces Black to choose one of the two moves that does not lose a piece.

If 5..Qe6, then I would choose 6.Bf4 from among many good moves. Then 6..c6 7.Qd3
and the contrast between positions is huge.

If 5. Bxe2, then Nxe2, with a similar outcome.

Perhaps you were only concerned about losing a tempo to Nf3 and forgot about d4? I think that White is close to winning. Even if not, you have a long and perilous defence to look forward to.