H4 to F1 COS - New I120 from college

[tech4appa]

Filed for COS from H4 to F1 6 months back, but the status is still "Initial Review".
Now planning to go to India to get stamped.

Questions --

Requesting a new I120 from the university takes 15 working days.
If i request for a new I120 and before 15 days i get a decision from USCIS, what will happen?
Will my current process get suspended when a new I120 is generated?

Appreciate your valuable suggestion.

Thanks
Sara