Dr suspects preeclampsia

My last dr appointment a month ago I had high blood pressure but that was the only thing that was wrong with me. Today i answered a bunch of her questions like "have you had headaches" yes since last Tuesday it hasn't gone away despite Tylenol and rest. "Any swelling" since last Tuesday my feet get so swollen by the end of the day I can't bend my toes at all they're like mini sausages. "Any discomfort" aside from pelvic pressure I have had a pinching cramping pain on the top right part of my stomach that a few nights have been so painful it kept me up all night and nothing I did could relieve it. I just didn't want to wake my family by being a worry wart so I toughed it out. She didn't like that answer at all. She said there wasn't any protein in my urine and my blood pressure was "okay, not ideal" so with my other symptoms she decided to draw blood and am awaiting results. Has anyone else experienced preeclampsia at 28w? What happens? If I get diagnosed with it what should I expect in the upcoming weeks? Were you diagnosed with it despite no protein in urine?