I cheated. Now I'm paying the price.

I have been having a problem sleeping recently. The other night, I got up at 5 am, which was very annoying. So, last night, I took an antihistamine: dimenhydrinate (Dramamine), to put me to sleep. It worked very well. I felt sleepy after 30 minutes. In the morning, I didn't get up until 10:30 am. I was very satisfied. But, tonight, I'm having the same problem again. I didn't take a nap at all today. Now, it's 3:45 am and I'm awake, plus quite alert. :(