Can I have sex right after my period?

Hi there, I hope someone can give me some advice.

I’ve been using combination birth control pills for 2 months and I plan to have sex.

What’s the best time for sex while on birth control pills?

My period usually start at the 6th day of my placebo week and lasts 3-4 days.

Can I have sex after my period?

Any tips on how not to get pregnant but enjoy sex at the same time?