Anxiety attack pls help :( need answers

It’s my first time on birth control pills.

I’m using low dose combination birth control pills.

I started to take them 3 days after my period ended. I started on Feb 3.

I followed the pamphlet to wait 7 days before having unprotected sex.

I had sex on Feb 12. Which was the 10th day of taking the pill.

I know it says on the pamphlet that it’s okay to have unprotected sex after 7 days of using it but still my anxiety is kicking in.

Today is my 3rd day on the placebo pills but I still have no bleeding.

Here are my questions I hope someone can answer them and help me...

1) Is this normal not to bleed during placebo week?

2) Should I be worried?

3) Could I get pregnant even if I waited 7 days before unprotected sex?

4) What will happen if I don’t bleed during my placebo week?

I have 4 days left and on March 2 I’ll be starting another pack. What should I do? Please help I’m so paranoid 🥺