Pregnant or Not

I Had My Last Period May 15 , June Came No Period At All , July Is Here No Period , I Have Taken 10 Test All NEGATIVE I Did Spot 2 Weeks Before I Was Suppose To Have A Period In July Nothing Major Only Visible When I Wipe (very light pink) I Been Feeling Tired , I Work Fast Food And I Can Never Eat Anything Until I Come Home , I Feel Bloated And Full All The Time , Been On A Emotional Roller Coaster , What You Guys Think?????? Also I Do Smoke Weed , Could That Effect My Hgc Levels? Yes Guys I Have Stop Smoking