Is it normal for all emotions to feel pretty much the same?

My emotions mostly feel pretty much the same, kind of like a rush of energy, and I can usually only tell exactly what I'm feeling by working out what I should be feeling. If I couldn't do that I think I'd have no idea, I'd know I was feeling something but I wouldn't know what it was. I mean, there are slight differences in the emotions but nowhere near big enough differences that I could distinguish between them.

I don't like to feel emotions as they all feel kind of uncomfortable to me, even the good ones. Happiness and excitement feel about the same as anger and fear.