Having a bad day

Hi

My name is jaimy and im almost 20 years old. I have a 10 month old baby girl Emma and since 4 months we have been trying for baby number 2. With Emma it took me 13 months to get pregnant and gave birth with 24+5 weeks so she was a micro preemie. I know 4 months trying is short but im just more sad then i was when trying for my first. I dont know if it makes sence or that im just being weird. Im now 6 days late for my period ( was 2 weeks late last month) and again not pregnant.