Is it too early to test?

Ciara • "Respect others in their views and demand that they respect yours." -A. Khole
I ovulated around 11/24-11/25, today i am 4/5 dpo and for a couple of days i have experienced mild period-like cramps that come and go. I have some nausea, increase in thirst (leading to frequent bathroom trips), and trouble sleeping (not due to pain though) but im not paying mind to those symptoms as much as the cramping. My period isnt due until 12/08-12/09, i do get cramps prior to my period but it is usually 4 days before my period is scheduled to start. My questions are: 
-Has anyone tested at 4 dpo due to the cramping and got a positive? 
-If this is a pregnancy symptom i am experience, should there or would there be enough hCG levels to be detected? Any and all info/stories would help!(: 

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