My 7 year old took 800 mg of ibuprofen, it has been almost 4 hours since she took them, she has ate and drunk in the meantime, my husband used an empty child's chewable bottle to take some regular 200 mg in his lunchbox and somehow they ended back up in the medicine cabinet, she chewed up 4 of them as that is her normal children's dose, so in total 800 mg...what should we do