I'm freaking out a little bit.?

Question

I had surgery last month to correct ovarian cysts and endomitriosis. While I was in surgery the Doctor did a chromotubation. The first of this month I started the first cycle of 50mg clomid. I am not due to start my period until Monday the 28th but I took the first response test and got an extremely faint line.. but still positive. I called my doctor right away and got in to see him. He did a urine test and it came out negative. I went to walgreens and got the EPT digital test and it said "Pregnant" is it possible that the doctors test isn't an early response? My husband and I have been trying for five years and I am anxious!