Cravings?

I'm just curious when everyone started their cravings if any because I am about 7 weeks no morning sickness or cravings that I know of I did have an upset tummy once in awhile few the past few days and I felt like I wanted to throw up but nothing comes up, and today I ate a lemon the whole thing I work at a bar and I eat them sometimes not the whole thing tho lol and I also wanted hot and spicy noodles bowl with extra hot sauce and lemon juice I used to eat them all the time and its been a few months but is it a prego craving?