HELP: 4 positive home test, doctor’s test is negative

I am 6 days late and my cycle is very regular (I am never late). I took 4 tests on different days, and they came back positive. Went to my OBGYN today and the urine test came back negative. And she didn’t want to take a blood test, but just told me to wait for another week or so to test again, and that perhaps my periods might be late due to stress (which I don’t have). Has this happened to anyone before? This was my first visit with the doctor. I am even thinking of changing to another doctor who will listen to me and be more attentive, or am I just overreacting?