convincing myself I'm NOT pregnant!

Okay so I'm really paranoid, I've been told millions of times I can't get pregnant from my bf fingering me with clean hands, but I still manage to end up crying because I don't want to be pregnant, my period is due in one week, so please it would be nice if any of you left some comforting messages saying I'm not pregnant (? :")

edit: and yes, after this I don't plan doing anything sexual until I'm more mature, actually I'm informed on how pregnancy works it's just I get really nervous !