So nervous and scared

I have taken 3 positive PT and all positives yet when people (close close friend) ask me how I'm feeling I keep saying well I don't know if I definitely am pregnant and I feel as if I don't want to let myself believe it or get excited incase I go to the doctors and they tell me I'm not, the anxiety is taking over me, I have brought 2 more PT to do one in the morning and one before I go to my doctors appointment Wednesday, anyone else feel like this?