Help please!

 At 4 days late I took a test (BFN) took another one at 6 days late (BFN). When to the ER for pain. They said my cervix was inflamed. But I still got a (BFN) when back to the ER for real bad  sharp pain on my right side. They did a blood test (BFN) I started spotting. Only when I wiped. Now I'm 11 days late. Could I still be pregnant. Have this happen to anyone else and got a BFP