Could I be preggers???

Amy • Been with my love since 2/26/2010
So I started af on Thursday it was heavy and then Friday I noticed it lightened up a lot and Saturday and Sunday nothing except for this morning I had pink discharge. I've read it could be ovulation but I've also read it could be pregnancy. When she I take a test? I took a test last Tuesday because I was having weird cravings like ranch ? Lol any advice would be awesome 

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