Urgent Care Pt. 2

So I got a call this morning from the urgent care I went to on Saturday for a blood test. The results came back negative, but I'm still having symptoms, no signs of AF (my last period was the end of May), and I've gotten two more faint positives Tuesday. They want me to come in for more tests and possibly an ultrasound, so I'm going to go in today or tomorrow, depending upon when I get back there today. I'm really anxious. Something is obviously going on, if only I could get some answers. Hopefully soon. I'm still so conflicted about what I want the outcome to be, but I NEED to know what's going on with me. I finally got to see my fiancée again yesterday (we're long distance at the moment) and of course he commented on my stomach being bigger/rounder than before, so obviously my body is changing.