Hey guys,

I had protected (condom) sex with my boyfriend last Thursday, the day before my period was due. It’s now Monday and I’m experiencing things that I usually experience before I come on (cramps, acne, headaches etc), but there’s no sign of blood. I’m still only sixteen so I’m aware that my period still won’t be completely regular, and that I’ve most likely got nothing to worry about.

Just to calm my nerves, what is the chance that I could possibly be pregnant?