Negative Urine Test

I went to the doctor's today and the urine pregnancy test they did was negative. I got a very clear positive on a FRER this morning, much darker than on Wed, so I asked the doctor if my urine could be too diluted (I drank about 1/2 a gallon of water already this morning and had peed several times at work). He said no. That annoyed me because I thought that's the exact reason why you're supposed to use FMU with hpts. Not only that, but I would only be 4w4d today, so it's super early. They sent me to do bloodwork and said that I should get the results today, but I called and won't get the results until Tuesday.
FWIW, I got another positive on a wondfo a few minutes ago. It was a faint line...probably because I've peed a million times today already...but positive nonetheless.

If I am still pregnant, I think I'm going to switch doctors. I was really upset by how dismissive he was with me today.