3 1/2 year old with high fever , very rapid heartbeat , very tired, cough , congested, restless and irritable. Went to the ER earlier and he had 104.1, came down and heartbeat was initially 180 and dropped to 120. After being home, his symptoms are all back. I have given him Motrin and supposed to give Tylenol next. Something doesn t seem right though. What do I do??