help me get pregnant

I want to have a baby and I have tried soo many things. I mean I am taking prenatal vitamins and I have tried all the little tricks like laying there on the bed with a pillow under you and doing it missionary style and doggie style but it seems that nothing I am doing is working. I really thought that this time I was pregnant because I just feel like I am. but I took a test yesterday and it said I was not pregnant which crushed me..it may of been to early but I still am like 99 percent sure that I am not pregnant..I want to be sooo bad and when I start my period this month I am gona be soo upset. I dont know what to do. I have asked soo many people about what to do ..if anyone has had something that they think has worked for them please let me know about it b/c I have been trying for a year now and I really want a baby. There are soo many pregnant people that I know and it hurts me to know that they can have a baby without even trying some of them did not even want one and I am over here working my butt off trying to have one. Please help me!! I am desperate and willing to try anything.