Did I overdoes on Dayquil?!

nope or you would be dead.
did you take to much, yes. tells you, liver damage.
don't take any more, see a doctor if sick.

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Nope you didnt overdose. And it wont cause liver damage unless you take severe amounts of the acetomenophin. In fact dayquil and nyquil are used recreationally to have a DXM trip. Its a very common thing to do for people to have a cheap easy accessable way to get effed up. If yo OD'ed youd be puking for quit a while and feel a sharp pain where the liver would be, even them it can be easily fixed. But youd have to drink 2 full bottles of that stuff and you STILL might not overdose. Its extremely hard to OD on any cough, cold, and congestion suppresant. Your totally fine. Drink 4 doses more to feel really good or just sleep to get any effects you do have out of our system. Your choice