What Causes Spotting,cramping,fatigue,food Cravings And Dizziness?

spotting for 6 days hi there! i had my period on the 29th of june and it finished about 4th .then i started spotting on 17th (bright red then light pink toward the end it was brown) and just stopped yesterday the 21. with that i had cramps fatigue food cravings..a bit of dry mouth once in a while dizziness..this happened last month too but not as bad..it was only for 2 days. could this be implantation bleeding or something else..if so when should i test for pregnancy