I had a slight cold so I took benadryl day when I woke up in the morning but it was so early that I forgot so before I left home I took 2 Tylenol extra strength. The whole day I felt terrible: headache, stomachache, dizzy, tired, nausea. (and I think I passed out during the day too). So when I got home I took more Tylenol now I feel the same effects but worse. I don't know what to do?