I have no desire to eat or do anything else

I just started my serious healthy life style this past Saturday. I have been exercising, staying under calorie limit and also taking raspberry ketone. I don't feel hungry or have any desire to eat at all. This happened for the past three days. I am suspecting it's because of raspberry ketone.
Also I feel emotionally vulnerable, is that related to cutting calories?
Anyone have similar experience? Please share with me.