When do I get my Depo Shot Again?

I got my last shot on the 10th of the march it is now the 10th of May. I know you’re supposed to get your shot every 3 months but does it go – April, May, June and I get my shot in June? Or does month 1 start in March when I got it on the 10th so – March, April, and I get my next shot in May? Thanks im really confused I don’t want to mess it up and have to start over

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