Negative HPT

So I have taken 2 hpt and they're both negative and I'm spotting. My period was due 2 days ago and I'm beginning to wonder if I'm pregnant. I had a dream that I was holding a baby girl the same day my period was due. I'm really trying to conceive. I'm 32 years old with two kids from a previous relationship and I'm now married to a guy that wants children. I have gained some weight and I'm wondering if I'm infertile. We lost one 2 years ago in September. I was 2 weeks pregnant and then I lost it. What do I do?!