I cant get pragnant?please help?

Im 23 years old, and I have been married for 2 and a half years. When we first got married we tried to be careful, but I was never on the pill, Just the normal withdrawel. But we only did that for about 2 months and not regularly. After that we have been trying to get pregnanttlike crazy, and everywhere I see a baby, it make's me so sad that I cant have one. My husband is 26 years old, and he wants a baby just as much as I do. Everymonth I have regular periods, but before I get my period I get like these pragnancy symptoms, and think YAY MABYE THIS TIME, but no just got them yesterday and I am very sad. Like most of americans I only have regular insurance from my employer and I am devostated if I go to the doctor and she tells me that there is something seriosly wrong with me or that I can have children its a nightmare, FOR ALL OF THOSE WHO WENT THROUGH THIS IM SURE YOU UNDERSTAND...i also have ovarian cysts my doctor said most women have those and they shouldent be any problem, but I didnt have any other tests done, because I cant afford them at all...so what Im asking here is that HAS ANYONE BEEN THROUGH THIS, AND USED ANY HERBS OR ANYTHING NATURAL? OR WHAT ELSE DID YOU DO TO BE SUCCESSFUL? i also heard about this Chaste Tree. ( Vitex - angus castus ) does anyone know anything about it or used it , or where I can buy it, because im stressed out and I dont know what to do Im just scared to death, and where im from they ALWAYS blame the women for this kind of stuff ...PLEASE HELP IM DESPERATE.....