Generally by checking your portfolio.  You should really google this and read up on it rather than asking on a message board, especially THIS message board.  


Sounds like you aren't trading options right now.  The value will be reflected in the value of the asset it goes up and down just like a stock and you can track its value in real time.      
I started typing up a summary about how volatility and time affect options, but I thought better of it.  Look it up, read about it, it isn't the sort of thing that you should learn about on Reddit (makes for long posts from dubious sources)