You can gain water weight while taking anavarbut that will go away once you stop taking it. A lot of the water is intramuscular water which a good thing for your muscles.
Yes you can take a fat burner as Marcia said.
Assuming it isn’t fake or underdozed you should be seeing and feeling results by now. It’s not going to hurt you to up the dose a little as well if you don’t have any sides.
And Marcia, actually anavar is one of the few steroids that have been shown to directly effect Lipolysis. So not proven but anavar is known to help burn fat. Unlike most steroids. However it will not be that noticeable if any alone, still need a calorie deficient and clean diet.