3 weeks late 2 faint positives, still uncertain.?

I have an appt. tomorrow.. but still want advice..What are your opinions on this. I am 3 weeks late, feeling nausiated, headaches, very tired, stomache has twinges, stomach burns on the inside, itches a little and Last week I got 2 faint positives. The first one was noticible,the second one was barely noticleble... I took both of them in the morning. Am I imagining all this? Am I pregnant?