Preeclampsia ??

I have a 2+ in my urine but not high bp. Feet are a little more swollen than normal. Dr. Doesn't seem concerned to think I have pre e but am worried if I do. He hasn't sent me for more blood work or a 24hour urine catch at home. Should I be worried? I am seeing him weekly (currently 37 weeks) so I will see him next week and am having c section at 39 weeks. I am being treated for a UTI at the moment and also have kidney stones, so maybe it's related to that?