Jamiessi,
You may find it reassuring to click on 'search' at the top of the page and search (forums) for other past TOM threads. There have been many with good details and encouragement around this topic.
I always gain 3-4 pounds and it can be very discouraging, even if you know it is TOM. Sometimes it feels like between gaining and then losing the TOM gain, there is only about a week left in the month to lose "real" weight. Still, I have been losing about 4 pounds per month which adds up.
The good thing is that I eat to satisfaction everyday healthy foods and I feel so great all the time.. no more low blood sugar downs!!
Hang in there!
Cheers,