Negative...

Lately I have been have true pregnancy symptoms. My nipples were killing me, I was craving and a few symptoms I had with my firstborn. Had blood drawn yesterday...it was negative... My doctor said that metformin is the only thing they can give me. All my hormones are normal, I just have irregular cycles and I'm guessing my weight is a major issue. I guess I am just looking for some guidance and tips on getting healthier to get a baby girl.