No, mine is more when I think of food, smell food, or after I have eaten. Much like in early pgcy for me. Could be hormonal, but I never have that more than a day or two unless I am pg. And I have had that for several weeks now.
But, as my husband keeps reminding me, I am not as young as I used to be, and each of my last pgcies have brought on something new. So, who knows what is going on.