I don't understand!!

Brittani • Miscarriage of twins 2012, recently married, and Ectopic Pregnancy 12/2016, Rainbow due 9/21/17
I have had all these symptoms for going on 2 weeks, but I have yet to test positive. Why?! Why can't I just have a test give me a BFP? It's really bringing me down. We want a child so badly! Please send baby dust and tips if you have any!! Thanks in advance ❤️