When, for a change, everything in life is great?

Preface: I have low self-esteem, but I am not a negative person. Even when the day really stinks, I find something good about it. I journal and create art, frequently. I love people. I love my friends. I would actually say I'm an optimist! It just so happens that I have difficulty realizing my self-worth, capabilities, etc... I'm very hard on myself, and often use self-deprecating humor.

Anyway, today was quite possibly the best day I've had in a LONG time! I got my dream job, aced an exam, made it to my weight-lifting class, baked cookies, embraced the emotions I was having for my crush... And to top it off, I think I looked hot today.

But when I got home, I had this weird feeling of guilt. Like somehow, I didn't feel deserving of any of this. I think about other people who are suffering, and I feel almost disgusted with myself. When I'm having a good time I'm also afraid to show those emotions - how is that supposed to make any sense?? I thought people usually hide their bad emotions.

Does anybody else relate to the feelings of unworthiness?