So many symptoms so early

April
I started to have breast tenderness 1 or 2 DPO and have since had growing symptoms. I am now 4 or 5 DPO and have experienced extreme tiredness, headaches, frequent urination, fatigue, nausea, heightened smell sensitivity and mild cramps along with this lasting breast/nipple sensitivity/soreness. I am still 9 days away from AF (36-38 day cycle, I know it's long) and am questioning if I should be having symptoms so soon. Could this be pregnancy symptoms or early AF symptoms? Has anyone else experienced something similar?