Scared to have sex!

So I have been very scared to have sex since I found out, I have seen a bunch of women on here talking about how they bleed after sex and stuff.

I’m scared to see blood, but since I have an appointment tomorrow in the morning. I have decided to have sex.

If I were to bleed or spot later ,is this normal?

Should I be worried?

I have had light cramps every since I found out I was pregnant, so what if I have light cramps and spot or bleed tonight or by morning?

Is it only if it’s bright red and severe cramps that I should worry?

Sorry I have a lot of questions. This is my first pregnancy, so I don’t know what’s normal and what’s not!