Lent: when giving up things is wrong, part 1

If you give up something really precious (choccy, cakes, jelly babies) for Lent but it makes you so miserable/short tempered (and thereby all the people around you miserable), I'd venture to say it's not doing the right thing and somewhere the God/Jesus bit has got lost. If you can't do without your daily chocolate fix without turning into Attilla the Hun, go back to eating the chocolate...