221g h1 visa at Tijuana a week ago, can another employer file new petition right away?

Last week, After the visa interview i was handed 221g, i have emailed the necessary document to consulate. Haven’t heard back from Consulate yet. Meanwhile can another employer file a new petition for me right away? Is there some kind of waiting period?

Nope, you have to wait for the decision from the consulate. There is nothing else you can do now.

It is always better to get visa stamped from home country, as you may never know how long is the wait period, when the application goes to administrative processing.