Fresh H1b : two approved petition, one got 221(g), can I go for visa stamping with another?

Need Your Help Guys============I have got two H1B approved petition, I went to go visa stamping on 25-Jan-2018 (delhi) but received 221(g) which is still under admin process.My second employer is chasing me (though he doesn’t aware of my first case…) can I go ahead with stamping with second case? Or shall I wait for first case? But I am just worrying that what would happen if wait time would be longer?Note: I know that visa stamping can only happen with one petition.