Periods!!

Hi, I just wanted to know everyone's opions really. What is the best position to fall pregnant, what is the best medication/vitamins etc to help you with fertility? I haven't had a period for eight days and then all of a sudden today at 6pm I came on. I haven't had any symptoms like I normally do when I'm due on. Me and my partner have been together 6years and are desperate for a baby of our own. I had an abortion 8years ago and I seem to think this has something to do with me not falling pregnant. Has anyone got any tips on how to get pregnant and what to try please? Despartion here I can't stand crying all the time feeling down and depressed everytime I come on. My partner is so supportive and kind it's unreal and all I want to do is complete our family. Life isn't fair sometimes xx