How to make a baby 😍 who knew that it could be so confusing !!

Rachel
So excited, first month trying to conceve, after spending most of my life this far trying to NOT get pregnant , I'm now in completely unknown territory.... so any advice will be very welcomed.
when should I watch what I'm eating and drinking etc?? Should I not worry untill I'm confirmed pregnant??? 
should I stop eating the blue cheeses and sushi & drink odd glass of wine now??
Also do I have to lay on my back with hips raised after sex or is that a myth??
I'm taking Prenatal vitamins so I'm doing one thing right!!! 🙈