Hi My Names Melise. I'm 17 Days Late For My

Hi my names Melise. I'm 17 days late for my period. I had 2 days of very light bleeding 1 week before my period was due. . followed by some brown spotting. I've been getting cramps and extrmly tired. I've had a mixture of failed pregnancy tests and a faded second line and failed a blood test for hcg levels. Can I still be pregnant? I was trying to conceive but don't know if I am or not. I feel like I am.