So confuse help me?

Jamie
So my boyfriend and I been together for 3years and he's 27 and I 25.. but anyway I haven't got my period since August 16, 2014 and now we're in December and I took two tests last month it said not pregnant . But I know I have in regular period the very first time I ever had my period I was 15 and a half now I am 25 and still my period still comes when it wants too... I don't know what to do?? I do want a baby but it's so hard for me to get pregnant.. so stressful and I don't think about the baby as much as I did before.. I just want a regular period is that so hard to ask? :(