I feel like I'm going crazy!

My husband and I had a miscarriage in Dec 2018. We have been TTC since Feb 2019. My periods have been anywhere from 28 to 40 day long cycles. They are finally starting to regulate themselves. And we are finally beginning able to tell when I'm ovulating. It is a week before my period is suppose to start and I'm having light cramping and my breast are slightly tender. When I was pregnant the first time my boobs hurts so bad. I feel like my symptoms are all in my head because I want to be pregnant so badly. Do any of you feel this way? Am I crazy? And why am I cramping a week before my period, it feels like my period is coming super early.