13dpui BFN

Paulina
3 IUI and I was sure this one was going to work. I was told to test until 14 dpiui but I did it one day early and now I'm devastated. I have all kinds of symptoms, my boobs hurt, nausea, cramps etc. 
I did letrozole, gonal f , trigger shot , IUI and promitrium... 
any hope ladies? Anyone tested Bfn then bfp???