I am H4 got receipt number can i go to india during the processing time?

I am in H4 visa and i have filed my H1 this year and got receipt number a week back…I am planning to go to india for a month vacation.

Can i go with my H4 and come? or should i apply COS before leaving?

Do you know if the filed H-1 was w/ COS or w/o COS?