Hey Maria,
This is exactly what my morning sickness is like - every morning I'm queasy when I wake up and go for a pee - then noramally retch for a while (and wish I could just be sick as I'm sure I'd feel better if I was!), then dry retch again when I get to work, then just eat all day (as I'm STARVING all the time!).
It's really weird as when I have 'normal' non pregancy related sickness, I can't face eating anything - but this time, I only really feel sick when I'm hungry (i.e. first thing in the morning).
However, I probably didn't feel like this until week 7 or 8, but everyone's different.
Have you done a test?
Love
Valentine xxx