I failed my Geometry Regents!? :(?

I really thought I could do it but I ended up bombing it with a 48 :( I have never failed anything before, much less a final exam! I passed the class with a 78, thank God. I don't think I have to retake the class, I wouldn't want to if I had the option. But I feel so stupid! I know I have never been good at math but I honestly thought I passed... I have to go to summer review classes for a few weeks and then retake the exam in August I think. But I'm so nervous and I just feel so miserable! Please, can anyone give me advice or helping words? Please :(