Nuvaring Birth Control.

Fist time using birth control, My doc wasn't very convincing. need help & support. 
I started my period yesterday & I inserted nuvaring inside my vaginal today! As per my doctors instructions....
Am I safe to have unprotected sex with my fiancé right after my period ends ?  
Can he ejaculate deep inside me instead of the pull out method ? 
Can we have sex 2 - 3 times in a row without worrying of pregnancy ?