Crazy craving and nausea

So within the past few days I have been feeling more nauseous when I'm in the car or if I'm laying in bed with my daughter and she has her star lights that move on the ceiling. I know this is going to sound weird but I have been wanting hamburger pickles and vanilla bean icecream. Is it strange to be wanting this crazy of a craving. And I'm supposed to have my monthly in 7 days. But am really hoping that I could be pregnant because I have been trying for 3 years with no luck due to pcos.