Jennylynn, Victoria is exactly right! Your weight gain is very likely the result of premenstrual water retention. It is very discouraging to not see the results of all your hard work, but just because you can't see the results right this minute doesn't mean they aren't there!
Feeling sick must just add to your discouragement. It is so easy to just give up when you physically don't feel well. Try not to make any decisions about quitting while you feel so bad. Wait until you feel better and you'll probably see things in a different light! Good luck, and hope you feel better soon!