Pregnancy test both negative and positiveOpinions please!!!

So my whole life I have always had irregular periods, sometimes going months without having a period. Today however I am seven days late and for whatever reason I had a gut feeling that I needed to take a pregnancy test. So last night I took a hpt (clear blue plus) and it came back a VERY faint positive. Again this morning I took another test (clear blue digital) and it came back saying I was pregnant.

I couldn't believe it so I went to my primary care doctor and he did a urine screen and it came back negative. I told him about the other two tests and he said it still may be possible that I am indeed pregnant and the test they ran isn't correct. I immediately left the doctors office and went to buy more hpt. I came home and took four different brands of hpt, another clear blue, first response, and a couple other knock off brands. The first response and the clear blue came back both saying yes, pregnant. The two other brands I took had more VERY faint positives. I have more tests to take throughout the week.

My question is what are your opinions? Do you think I may be pregnant, or is this too good to be true? Has anyone else had similar experiences?