Did i add too many backlink too fast?

no while building backlinks you have to stretch them, this will help you a lot.

 

If it's a new site then it's going to the sandbox for sure...

 

Bunk. If there is a sandbox, I successfully avoid it with nearly every site I build. I must have a midas touch.

 

Natural Backlinks= No problem.
irecxtories have litle to no effect
Link Buying then you are in a spot. If your sites remove the links after 2 months, you will be pushed to the bottom and probably penalised.

 

It depends on many factors, like:

The anchor text, have you repeated it too much?
The linking site, is it a quality site or a page with 100s of links?
are you getting multiple links from the same domain/ip?
Are you deep linking>?