I live 5 miles from a military shooting range . could lead dust pose a threat on my family ? i am pregnant as well

5 miles is far away: Five miles is huge. All the newer toxins in our modern world, plus the naturally-occurring toxins that we didn't personally add in the past 100 years, will get you before any lead dust from the shooting range will. For example, cut down on anything that leaves plastic particles (such as tires), and minimize use of soaps and cosmetics... so our land and water will last a bit longer for our kids.