How much is too much?

I have been battling a miserable cold for almost a week now and it’s not letting up. The headaches are horrible. I’m draining like a fountain. My throat hurts from couching. All I’ve been taking is Tylenol about every 12 hours for the past 4 days because the headaches are horrible. I’m starting to get concerned with this prolonged use of Tylenol (I’m one of those that has to feel like I’m dying to take any medication). Is it okay to continue the Tylenol for another couple of days or should I just try to suck it up until it passes?