So Confused

This is my third pregnancy and the first two were 100% drama free. I took a test, it showed positive, it was confirmed and one we went. But this one is making me feel like I'm a newbie at all this. Given it's been 7 years since I've been pregnant and I'm sure my body has changed but I don't know what's going on. I'm a week late, mirad of symptoms that are pretty typical. ZERO signs AF is going to be coming. I've taken 8 tests. 4 are very clearly positive and 4 are like "Uhhhh maybe??" I even posted some one here for second opinions and the majority said they saw a little something. So today I schedule an appt with my primary dr and the test was a BFN with late morning urine and she refused to do a blood test. I was blown away. I called my gyno and have an appt tomorrow for an ultrasound and blood test. Has anyone else experienced anything like this? Did everything turn our fine or was your uterus just playing tricks on you. Please help.