What should I do?

So I took NyQuil during the day because we don't have DayQuil. I had a runny nose and a sore throat. I took some and a little while later I'm like really dizzy and lightheaded for some odd reason. Did I take too much than I should have? I looked up online that if you take too much you can go into a coma and possibly get really sick. And now I'm scared to go to bed because I'm scared I'm going to go in a coma. What should I do?
What should I do?
Post Opinion