Starting to feel hopeless...

I have known my entire life i was meant to be a mother. I have known i ws put on this earth to raise, nurture, and love my children. So. My boyfriend and I have been trying for about a year now. I know that isn't very long, but I just have a hard time keeping a positive outlook. I've gotten about four at home tests over the course of the year that have turned back positive, to no avail. I have been taking prenatals and tracking my period and ovulation. My period is always a week early, I have never once been on time. So I go to the doctor, he says there is absolutely nothing wrong that would keep me from conceiving. Now, my period is late. That has never happened. So I take a test, positive. My love and I go to Planned Parenthood to take another test, and its negative.

So really I'm just thinking, what the hell?? Am I just broken? I don't know what to do. I don't know how to stop obsessing over it.

Any kind words would be appreciated.