Pill help

Mia
I just started the pill and allowed my boyfriend to cum inside me ... About 3:4 days after I started taking it. 
So here are some pill questions please I'm 19 and need some girl help ?
1. How long till I should allow him to cum inside him whilst on the pill ( I'm not gonna do it all the time but just on the rare chance ) 
2.does the pill make you gain weight ? 
3. How do I take the pill ... Do I take it for days and then stop or ??? Please someone explain !! ❤️❤️❤️