confused

I've been nauseous for 2 weeks now and I pushed back my period 4 times. I finally woke up bleeding today but it was very light and I usually have heavy periods (with painful cramps) the only feeling I'm getting is the feeling of like air bubbles in my tummy and a sharp pain in my ovaries here and there. I've been in bed ALL day because I just keep falling asleep. I've been craving sushi as well and mind you, I HATE sushi.