Almost 5 weeks and ravenous help?!

Ive only just found out I'm pregnant a few days ago and since then my appetite has gone crazy! I literally eat and about half an hour to hour later I feel hungry again every morning I wake up my belly feels almost like it's burning and I feel hot I'm that hungry! I thought I'd be feeling more nauseous than ravenous 🙈 I just don't want to eat too much so soon anyone know any foods that fill you up for longer I recently became vegetarian and worry I should go back to meat to feel fuller otherwise our grocery shopping is gonna double by next week the way I'm going through food, I'm not eating for two but definitely don't stay full for long! Anyone have/had this?