First Gain?

Tonight it would appear that I am 1lb heavier!  Not sure if this is true.  Last week I was weighed first thing in the morning and this week at night, so not sure if there really is a gain? 
I know that I haven't been perfect with the diet this week, so I expected to stay same weight not to gain.  Last Tuesday hubby and I went out for an anniversary meal.  I enjoyed my food and could not finish it and had one glass of wine.  I stayed to my extra weekly points, so was planning staying good rest of week.  However, Thursday arrived with a hunger that would not be satisfied by the daily points, I went to bed hungry and woke up again in the morning hungry.  By Friday night I ended up having extra as I was ravenous the whole day!  Aunt Flow arrived late Friday night so I thought that might explain the hunger and Saturday was the same with me feeling constantly hungry, so again I had some extra snacks on Saturday night.  Sunday was back to diet, but still hungry and today I had the shakes by 11.30am with the hunger again!  Was good today, until I got weighed! 
When the leader of the weigh in class weighed me, she asked me if I expected it and I said I had been really hungry this week, and out for a meal and time of the month.  She asked me to fill in a food diary for her to check!  With the first gain of 1lb with good reason(?) not sure that I really need to do this as it's not as if I stuck to the diet and was having normal hormone levels!  I said ok, but as I walked away I remembered that hubby and I are out for dinner this weekend and have bed and breakfast in a hotel, so not sure how good I will be Saturday night and Sunday morning.  I'm hoping this crazy hunger I've been having will die off and return to normal so that thre rest of the week I will be good.  But we'll wait and see what the scales say next week!
So, kind of a little peeved with the need for a food diary considering how good I've been up to now, I came home and opened up a box of chocolates that my mum gave me as a present and ate 5 chocolates, felt sick on the fourth one!  See what happens.  Off to bed now feeling sick rather than hungry, and hoping to be a good girl until Saturday night! ;)