There is no one answer, for some people, they never change, for some soon during 2nd or 3rd months, others eating habits change thoughout.
It will change for you, when it changes
I'm not sure if I am pregnant yet. I had my period June 19 through 22 but it was really light compared to normal. So I'm not sure if I should wait to see if I miss my period next month or what.. I just have this feeling that I could be pregnant. And these last couple days I have been craving so much random foods. I don't know if I should wait to test until next month or what.