milk cravings

So, before bed, I usually have a sweet snack. I get hungry around 11pm for SOMETHING.. anything really.. (no I am not currently pregnant; not for a lack of trying). But the last three days, I have been craving milk. And when I have nothing sweet for my "midnight snack" I'm taking whip cream straight from the container; spraying it right into my mouth and then chasing it with milk... not to mention, I want cheese on everything. I know it COULD be a sign, but I'm wondering if it's a sign many have had before a BFP? I don't want to take a test and get let down again.. AF due in 3 days