Ive tested negatice but..

So Ive been showing signs of preeclamsia at my last couple visits. Higher than normal blood pressure, visual changes and dull throbbing headache that won't go away, so they tested me for pre-e and labs came back within normal range, soo my question to you ladies is..after being tested can you still develop pre-e? I just don't know if I'm being a little too worry some or if Im being proactive. My cousin actually just lost her baby to a placental abruption due to pre-e so it's hard not to have that in the back of my mind. Im 33w btw. Thanks in advance!