Is it normal to feel like crap after drinking and clubbing?

I normally go to clubs, and I stand on the wall. But this time I said fuck it, due a recent event in my life. I drink, danced, flirted, and I felt like I could've gotten any chick in that place. And had plans to meet chicks afterward. I was full of confidence and energy the whole night. I felt like I could do it every night. But the next day I feel like shit. I have a headache, feel embarrassed about my behavior, and I feel like I don't have the energy or stomach to do it again. I also miss my online girlfriend, who doesn't contact me anymore. It hurts alot. I wanted to meet her. I went out and flirted with real women but I miss her so much. I usually have the comfort of talking to her but she's acting different.