OC worries

I've been having a major Artblock ever since I started creating the beyblade fic and drawing a lot of pictures of Rowena, amanda and the rest of my ocs. but what worries me is that some of my oc's would be classified as mary sues and might ended up on a Mary Sue tumblr Blog. and I don't want that to happened, I draw in my own style, I mean I don't do recolors, I don't copy nor Steal anyone else artwork. well I did use a base many times but still I always credit back the owner of the base. but since I got the tablet, things have gotten a lot easier. I'll do a Mary Sue Test, just to classify if all my oc's are mary sues or just plain old oc's. just to prove my case and I'll submit the results after I submit the 3rd part of the beyblade fanfic.