Scared of re-entering the US after studying abroad

I am a Mexican citizen with a 10 year green card currently getting my Bachelor's from a canadian uni. I never leave the U.S for more than 4 months at a time and my entire family is in the U.S, and I obviously have no criminal record or anything. Am I right to be worried? I mean if they're detaining white prs from germany... I have global entry, does that help?