Crazy symptoms, BFN

Brittney
Hello all, I am having crazy symptoms, like backache, sore veiny breasts and frequent urination. I mean I am talking, I am going to the bathroom every 20-30 minutes and sometimes I don't make it! AF is due on the 31st, I took a test this morning and it was a BFN. Is there still hope? I seriously have a strong intuition of pregnancy.