Is This A Stall?

I haven't had my surgery yet, I am still doing my pre-op diet, its been 2 months now (my surgery has been postponed a few times >.<). On Monday of last week I was 307 and since that day my weight goes up to 309.36, and then down to 306.99. I'll go down 1 pound one day, up 1 pound the next day, or go up and up for a few days and then down, and then up again! (I did have my period until Wednesday). It is so frustrating, I did exercise only twice last week because I wasn't feeling well, the days I didn't exercise I would eat less calories, I have not stopped tracking what I eat in myfitnesspal. I know in my head that to go up I would need to consume 3500 over what I eat, and it takes me 4 days to eat 3500 calories anyway! Is this normal? A stall?