How can I relieve my cravings?

Ok, so I'm around 3 or 4 weeks pregnant and I'm having odd cravings and its driving me crazy because I dont have any of this stuff in my house. The other day it was onions, then it was chocolate, yesterday it was beef jerky, and now it's my aunt's spaghetti sauce, she has her own way of making it and its awesome. How can I fix my cravings when I dont have any of this stuff?