Super hungry during ovulation

Hi everyone, 
I wondered if you could help me....
I have recently undergone surgery to remove patches of endometriosis and polycystic cysts. 
Before my operation I didn't ovulate successfully, since my operation I am ovulating! (Yayyyy)
But can I ask, is it normal to feel extremely hungry and 'hormonal' during ovulation?
I feel like I'm due to start my period but it's not that time yet.
I am not a greedy person, and I eat a well balanced diet. I have very good self restraint and rarely binge on 'rubbish' food. Although today I just can't get full, I am ravished. I want to eat everything in sight. I am especially craving sugar (I don't normally have a sweet tooth), today I just can't stop this craving.
I would appreciate anyone's advise and feedback please.
Also I had a positive ovulation test today and a negative one this evening? Can you get false positives? 
Myself and my partner have been trying for a little one for over four years, so I really would appreciate any advice.
Thank you